Sologubenko, A. V., Lorenz, T., Mydosh, J. A., Thielemann, B., Ronnow, H. M., Ruegg, Ch., ...
We present experiments on the magnetic field-dependent thermal transport in the spin-1/2 ladder system (C$_5$H$_{12}$N)$_2$CuBr$_4$. The thermal conductivity $\kappa(B)$ is only weakly affected by...
Scale-free antiferromagnetic fluctuations in the S=1/2 kagome antiferromagnet herbertsmithite (2009)
De Vries, M. A., Stewart, J. R., Deen, P. P., Ronnow, H. M., Harrison, A.
We report on a neutron spectroscopy study of the practically ideal physical realization of the S=1/2 kagome antiferromagnet herbertsmithite [ZnCu3(OH)6Cl2]. Using a combination of neutron...
De Vries, M. A., Johal, T. K., Mirone, A., Claydon, J. S., Nilsen, G. J., Ronnow, H. M., ...
We report x-ray absorption and x-ray linear dichroism measurements at the Fe L-2,L-3 edges of the geometrically frustrated systems of potassium and hydronium iron jarosite. Comparison with simulated...
De Vries, M. A., Johal, T. K., Mirone, A., Claydon, J. S., Nilsen, G. J., Ronnow, H. M., ...
We report x-ray absorption and x-ray linear dichroism measurements at the Fe L2,3 edges of the geometrically frustrated systems of potassium and hydronium iron jarosite. Comparison with simulated...
Jaramillo, R., Feng, Yejun, Lang, J. C., Islam, Z., Srajer, G., Ronnow, H. M., ...
The spin- and charge-density-wave order parameters of the itinerant antiferromagnet chromium are measured directly with non-resonant x-ray diffraction as the system is driven towards its quantum...
Chang, J., Niedermayer, Ch., Gilardi, R., Christensen, N. B., Ronnow, H. M., McMorrow, D. F., ...
We report the results of a combined muon-spin rotation and neutron-scattering study on La2-xSrxCuO4 in the vicinity of the so-called 1/8 anomaly. Application of a magnetic field drives the system...
Jaramillo, R., Feng, Yejun, Lang, J. C., Islam, Z., Srajer, G., Ronnow, H. M., ...
The spin- and charge-density-wave order parameters of the itinerant antiferromagnet chromium are directly measured with nonresonant x-ray diffraction as the system is driven toward its quantum...
A new realisation of the S=1/2 frustrated chain antiferromagnet (2008)
Nilsen, G. J., Ronnow, H. M., Laeuchli, A. M., Fabbiani, F. P. A., Sanchez-Benitez, J., Kamenev, K. V., ...
Chang, J., Niedermayer, Ch., Gilardi, R., Christensen, N. B., Ronnow, H. M., McMorrow, D. F., ...
We report the results of a combined muon spin rotation and neutron scattering study on La2-xSrxCuO4 in the vicinity of the so-called 1/8-anomaly. Application of a magnetic field drives the system...
Quantum dynamics and entanglement of spins on a square lattice (2007)
Christensen, N. B., Ronnow, H. M., McMorrow, D. F., Harrison, A., Perring, T. G., Enderle, M., ...
Bulk magnetism in solids is fundamentally quantum mechanical in nature. Yet in many situations, including our everyday encounters with magnetic materials, quantum effects are masked, and it often...
Chang, J., Schnyder, A. P., Gilardi, R., Ronnow, H. M., Pailhes, S., Christensen, N. B., ...
High-resolution neutron inelastic scattering experiments in applied magnetic fields have been performed on La$_{1.895}$Sr$_{0.105}$CuO$_{4}$ (LSCO). In zero field, the temperature dependence of the...
Vignolle, B., Hayden, S. M., McMorrow, D. F., Ronnow, H. M., Lake, B., Frost, C. D., ...
The excitations responsible for producing high-temperature superconductivity in the cuprates have not been identified. Two promising candidates are collective spin excitations and phonons. A recent...
Anisotropy and the critical behaviour of the quasi-2D antiferromagnet, MnPS3 (2007)
Wildes, A. R., Ronnow, H. M., Roessli, B., Harris, Mt, Godfrey, K. W.
Neutron scattering has been used to measure the critical behaviour of the sublattice magnetization, M, and the gap in the spin wave energies at the Brillouin zone centre, E-0, for a single crystal of...
Trapping, self-trapping and the polaron family (2007)
Stoneham, A. M., Gavartin, J., Shluger, A. L., Kimmel, A. V., Ramo, D. Munoz, Ronnow, H. M., ...
The earliest ideas of the polaron recognized that the coupling of an electron to ionic vibrations would affect its apparent mass and could effectively immobilize the carrier (self-trapping). We...
The surface layer of cleaved bilayer manganites (2007)
Loviat, F., Ronnow, H. M., Renner, Ch, Aeppli, G., Kimura, T., Tokura, Y.
Recently, several informative reports have been published on spectroscopy experiments performed on cleaved surfaces of the bilayered colossal magnetoresistive manganite La2-2xSr1+2xMn2O7 (Konoto et...
Quantum dynamics and entanglement of spins on a square lattice (2007)
Christensen, N. B., Ronnow, H. M., McMorrow, D. F., Harrison, A., Perring, T. G., Enderle, M., ...
Bulk magnetism in solids is fundamentally quantum mechanical in nature. Yet in many situations, including our everyday encounters with magnetic materials, quantum effects are masked, and it often...
Nature of the magnetic order in the charge-ordered cuprate La1.48Nd0.4Sr0.12CuO4 (2007)
Christensen, N. B., Ronnow, H. M., Mesot, J., Ewings, R. A., Momono, N., Oda, M., ...
Using polarized neutron scattering we establish that the magnetic order in La1.48Nd0.4Sr0.12CuO4 is either (i) one dimensionally modulated and collinear, consistent with the stripe model or (ii) two...
Coomer, F. C., Bondah-Jagalu, V., Grant, K. J., Harrison, A., McIntyre, G. J., Ronnow, H. M., ...
We report the neutron scattering studies of the nuclear and magnetic structures of deuterated samples of the model two-dimensional S=1/2 Heisenberg antiferromagnets on a square lattice,...
Two energy scales in the spin excitations of the high-temperature superconductor La2-xSrxCuO4 (2007)
Vignolle, B., Hayden, S. M., McMorrow, D. F., Ronnow, H. M., Lake, B., Frost, C. D., ...
The excitations responsible for producing high-temperature superconductivity in the copper oxides have yet to be identified. Two promising candidates are collective spin excitations and phonons(1). A...
Magnetic excitations near the quantum phase transition in the Ising ferromagnet LiHoF4 (2007)
Ronnow, H. M., Jensen, J., Parthasarathy, R., Aeppli, G., Rosenbaum, T. F., McMorrow, D. F., ...
Effective-medium theory and inelastic neutron scattering are used to study the magnetic excitations in the Ising ferromagnet LiHoF4 near its magnetic-field-induced quantum phase transition (QPT). As...
Chang, J., Schnyder, A. P., Gilardi, R., Ronnow, H. M., Pailhes, S., Christensen, N. B., ...
High-resolution neutron inelastic scattering experiments in applied magnetic fields have been performed on La1.895Sr0.105CuO4 (LSCO). In zero field, the temperature dependence of the low-energy peak...
Multiple magnon modes and consequences for the Bose-Einstein condensed phase in BaCuSi2O6 (2007)
Ruegg, Ch., McMorrow, D. F., Normand, B., Ronnow, H. M., Sebastian, S. E., Fisher, I. R., ...
The compound BaCuSi2O6 is a quantum magnet with antiferromagnetic dimers of S=1/2 moments on a quasi-2D square lattice. We have investigated its spin dynamics by inelastic neutron scattering...
Christensen, N. B., Ronnow, H. M., Mesot, J., Ewings, R. A., Momono, N., Oda, M., ...
Using polarized neutron scattering we establish that the magnetic order in La$_{1.48}$Nd$_{0.4}$Sr$_{0.12}$CuO$_4$ is either (i) one dimensionally modulated and collinear, consistent with the stripe...
Multiple Magnon Modes and Consequences for the Bose-Einstein Condensed Phase in BaCuSi2O6 (2006)
Rüegg, Ch., McMorrow, D. F., Normand, B., Ronnow, H. M., Sebastian, S. E., Fisher, I. R., ...
The compound BaCuSi2O6 is a quantum magnet with antiferromagnetic dimers of S = 1/2 moments on a quasi-2D square lattice. We have investigated its spin dynamics by inelastic neutron scattering...
Three-dimensionality of field-induced magnetism in a high-temperature superconductor (2006)
Lake, B., Lefmann, K., Christensen, N. B., Aeppli, G., McMorrow, D. F., Ronnow, H. M., ...
Many physical properties of high-temperature (high-Tc) superconductors are two-dimensional phenomena derived from their square planar CuO2 building blocks. This is especially true of the magnetism...
Static and dynamic critical properties of the quasi-two-dimensional antiferromagnet MnPS3 (2006)
Wildes, A. R., Ronnow, H. M., Roessli, B., Harris, M. J., Godfrey, K. W.
A comprehensive study of the static and dynamic critical properties of the quasi-two-dimensional antiferromagnet MnPS3 is presented. The relatively large spin S=5/2 of the Mn ions ensure...
Polarons and confinement of electronic motion to two dimensions in a layered manganite (2006)
Ronnow, H. M., Renner, C., Aeppli, G., Kimura, T., Tokura, Y.
A remarkable feature of layered transition-metal oxides-most famously, the high-temperature superconductors-is that they can display hugely anisotropic electrical and optical properties (for example,...
Bahl, C. R. H., Lefmann, K., Abrahamsen, A. B., Ronnow, H. M., Saxild, F., Jensen, T. B. S., ...
Recently a monochromatic multiple data taking mode has been demonstrated for diffraction experiments using a RITA type cold neutron spectrometer with a multi-bladed analyser and a position-sensitive...
Ronnow, H. M., Renner, Ch., Aeppli, G., Kimura, T., Tokura, Y.
A very remarkable feature of the layered transition metal oxides (TMOs), whose most famous members are the high-temperature superconductors (HTSs), is that even though they are prepared as bulk...
Renner, Ch., Aeppli, G., Ronnow, H. M.
A microscopic characterisation of the phase transitions associated with colossal magnetoresistance (CMR) in manganese perovskite oxides is a very important ingredient in the quest of understanding...
Quantum Phase Transition of a Magnet in a Spin Bath (2005)
Ronnow, H. M., Parthasarathy, R., Jensen, J., Aeppli, G., Rosenbaum, T. F., McMorrow, D. F.
The excitation spectrum of a model magnetic system, LiHoF$_4$, has been studied using neutron spectroscopy as the system is tuned to its quantum critical point by an applied magnetic field. The...
Incommensurate magnetism in the coupled spin tetrahedra system Cu2Te2O5Cl2 (2005)
Zaharko, O., Ronnow, H. M., Daoud-Aladine, A., Streule, S., Juranyi, F., Mesot, J., ...
Neutron scattering studies on powder and single crystals have provided new evidences for unconventional magnetism in Cu2Te2O5Cl2. The compound is built from tetrahedral clusters of S=1/2 Cu2+ spins...
Quantum phase transition of a magnet in a spin bath (2005)
Ronnow, H M, Parthasarathy, R, Jensen, J, Aeppli, G, Rosenbaum, T F, McMorrow, D F
Incommensurate magnetism in the coupled spin tetrahedra system Cu2Te2O5Cl2 (2005)
Zaharko, O., Ronnow, H. M., Daoud-Aladine, A., Streule, S., Juranyi, F., Mesot, J., ...
Neutron scattering studies on powder and single crystals have provided new evidence for unconventional magnetism in Cu2Te2O5Cl2. The compound is built from tetrahedral clusters of S=1/2 Cu2+ spins...
Quantum phase transition of a magnet in a spin bath (2005)
Ronnow, H. M., Parthasarathy, R., Jensen, J., Aeppli, G., Rosenbaum, T. F., McMorrow, D. F.
The excitation spectrum of a model magnetic system, LiHoF4, was studied with the use of neutron spectroscopy as the system was tuned to its quantum critical point by an applied magnetic field. The...
Renner, C., Aeppli, G., Ronnow, H. M.
A microscopic characterisation of the phase transitions associated with colossal magnetoresistance (CMR) in manganese perovskite oxides is a very important ingredient in the quest of understanding...
Three-dimensionality of field-induced magnetism in a high-temperature superconductor (2005)
Lake, B., Lefmann, K., Christensen, N. B., Aeppli, G., McMorrow, D. F., Ronnow, H. M., ...
Many physical properties of high-temperature superconductors are two-dimensional phenomena derived from their square-planar CuO2 building blocks. This is especially true of the magnetism from the...
Quantum helimagnetism of the frustrated spin-(1)/(2) chain LiCuVO4 (2005)
Enderle, M., Mukherjee, C., Fak, B., Kremer, R. K., Broto, J. M., Rosner, H., ...
Inelastic neutron scattering, susceptibility, and high-field magnetization identify LiCuVO4 as a nearest-neighbour ferromagnetic, next-nearest-neighbour frustrated, quasi-one-dimensional helimagnet,...
Dispersive Excitations in the High-Temperature Superconductor La2-xSrxCuO4 (2004)
Christensen, N.B., McMorrow, D.F., Ronnow, H.M., Lake, B., Hayden, S.M., Aeppli, G., ...
High-resolution neutron scattering experiments on optimally doped La2-xSrxCuO4 (x=0.16) reveal that the magnetic excitations are dispersive. The dispersion is the same as in YBa2Cu3O6.85, and is...
Schnyder, A. P., Bill, A., Mudry, C., Gilardi, R., Ronnow, H. M., Mesot, J.
Using a fermiology approach to the computation of the magnetic susceptibility measured by neutron scattering in hole-doped high-Tc superconductors, we estimate the effects on the incommensurate peaks...
Universal Dispersive Excitations in the High-Temperature Superconductors (2004)
Christensen, N. B., McMorrow, D. F., Ronnow, H. M., Lake, B., Hayden, S. M., Aeppli, G., ...
High-resolution neutron scattering experiments on optimally doped La$_{2-x}$Sr$_x$CuO$_4$ have been performed which reveal that the magnetic excitations are dispersive. The dispersion is found to be...
Dispersive excitations in the high-temperature superconductor La2-xSrxCuO4 (2004)
Christensen, N B, McMorrow, D F, Ronnow, H M, Lake, B, Hayden, S M, Aeppli, G, ...
Deviations from linear spin wave theory in the 2D, S=1/2 Heisenberg antiferromagnet CFTD (2004)
Christensen, N B, McMorrow, D F, Ronnow, H M, Harrison, A, Perring, T G, Coldea, R
Static and dynamic spins in superconducting La2-xSrxCuO4: The Riso years (2004)
Lefmann, K, Lake, B, Aeppli, G, Cheong, S W, Christensen, N B, Clausen, K N, ...
Effects of magnetic field on the cuprate high-T-c superconductor La2-xSrxCuO4 (2004)
Lake, B, Aeppli, G, Christensen, N B, Lefmann, K, McMorrow, D F, Clausen, K N, ...
Evidence for an incommensurate magnetic resonance in La2-xSrxCuO4 (2004)
Tranquada, J. M., Lee, C. H., Yamada, K., Lee, Y. S., Regnault, L. P., Ronnow, H. M.
We study the effect of a magnetic field (applied along the c axis) on the low-energy, incommensurate magnetic fluctuations in superconducting La1.82Sr0.18CuO4. The incommensurate peaks at 9 meV,...
Schnyder, A. P., Bill, A., Mudry, C., Gilardi, R., Ronnow, H. M., Mesot, J.
Using a fermiology approach to the computation of the magnetic susceptibility measured by neutron scattering in hole-doped high-T-c superconductors, we estimate the effects on the incommensurate...
Chasing ghosts in reciprocal space - a novel inelastic neutron multiple scattering process (2004)
Ronnow, H. M., Regnault, L. P., Lorenzo, J. E.
We have discovered that a recently reported weak excitation branch in the spin-Peierls material CuGeO3 is in fact a ghost image of the primary magnetic excitation shifted in reciprocal space by a...
Inelastic neutron polarization analysis in low-dimensional systems (2004)
Regnault, L. P., Ronnow, H. M., Boullier, C., Lorenzo, J. E., Marin, C.
We will review recent results obtained by longitudinal polarization analysis and spherical neutron polarimetry (SNP) on typical low-dimensional strongly correlated electronic systems (spin-Peierls...
Static and dynamic spins in superconducting La2-xSrxCuO4: The Riso years (2004)
Lefmann, K., Lake, B., Aeppli, G., Cheong, S. W., Christensen, N. B., Clausen, K. N., ...
One important area of modern condensed matter research is the investigation of the nature of the superconducting cuprates. Much progress in this field has been obtained with the technique of neutron...
Effects of magnetic field on the cuprate high-T-c superconductor La2-xSrxCuO4 (2004)
Lake, B., Aeppli, G., Christensen, N. B., Lefmann, K., McMorrow, D. F., Clausen, K. N., ...
This article discusses neutron scattering measurements on the cuprate, high transition temperature superconductor La2-xSrxCuO4 (LSCO) in an applied magnetic field. LSCO is a type-II superconductor...
Spin dynamics in the mixed phase of La2-xSrxCuO4 (x=0.10, x=0.17) (2004)
Gilardi, R., Streule, S., Hiess, A., Ronnow, H. M., Oda, M., Momono, N., ...
We present an inelastic neutron scattering study of the spin dynamics in the mixed phase of the high-T-c superconductor La2-xSrxCuO4, In the overdoped regime (x = 0. 17, T-c = 37 K) the application...
The performance of a multiplexing three-axis spectrometer (2004)
Demmel, F., Grach, N., Ronnow, H. M.
A novel multiplexing three-axis spectrometer for thermal neutrons has been tested for single-crystal spectroscopy. Measuring the entire 2D dispersion manifold in the bc plane of the spin-Peierls...
Dispersive excitations in the high-temperature superconductor La2-xSrxCuO4 (2004)
Christensen, N. B., McMorrow, D. F., Ronnow, H. M., Lake, B., Hayden, S. M., Aeppli, G., ...
High-resolution neutron scattering experiments on optimally doped La2-xSrxCuO4 (x=0.16) reveal that the magnetic excitations are dispersive. The dispersion is the same as in YBa2Cu3O6.85, and is...
Deviations from linear spin wave theory in the 2D, S=1/2 Heisenberg antiferromagnet CFTD (2004)
Christensen, N. B., McMorrow, D. F., Ronnow, H. M., Harrison, A., Perring, T. G., Coldea, R.
The spin excitation spectrum in the 2D square lattice Heisenberg antiferromagnet CFTD has been investigated using time-of-flight neutron scattering. The magnon dispersion and intensities have been...
Longitudinal-neutron-polarization-analysis study of the spin dynamics in Sr14Cu24O41 (2004)
Boullier, C., Regnault, L. P., Lorenzo, J. E., Ronnow, H. M., Ammerahl, U., Dhalenne, G., ...
The crystallographic structure of the cuprate Sr14Cu24O41 is a misfit stacking of layers of two distinct quantum-spin systems: linear edge-sharing CuO2 chains and 2-leg Cu2O3 spin-ladders....
Bonville, P., Hodges, J. A., Bertin, E., Bouchaud, J. P., De Reotier, P. D., Regnault, L. P., ...
The very low temperature properties of two pyrochlore compounds, Yb2Ti2O7 and Gd2Sn2O7, were investigated using an ensemble of microscopic and bulk techniques. In both compounds, a first order...
Evidence for an incommensurate magnetic resonance in La(2-x)Sr(x)CuO(4) (2003)
Tranquada, J. M., Lee, C. H., Yamada, K., Lee, Y. S., Regnault, L. P., Ronnow, H. M.
We study the effect of a magnetic field (applied along the c-axis) on the low-energy, incommensurate magnetic fluctuations in superconducting La(1.82)Sr(0.18)CuO(4). The incommensurate peaks at 9...
Transition and spin dynamics at very low temperature in the pyrochlores Yb2Ti2O7 and Gd2Sn2O7 (2003)
Bonville, P., Hodges, J. A., Bertin, E., Bouchaud, J. P., Ocio, M., De Reotier, P. Dalmas, ...
The very low temperature properties of two pyrochlore compounds, Yb2Ti2O7 and Gd2Sn2O7, were investigated using an ensemble of microscopic and bulk techniques. In both compounds, a first order...
Bonville, P, Hodges, JA, Bertin, E, Bouchaud, J-Ph, Ocio, M, ...
Eds Goerlich, Krolas and Pedziwiatr (Krakow 2003)
The field-induced soliton phase of CuGeO3 (2003)
Ronnow, H. M., Mechthild, E., McMorrow, D. F., Regnault, L. P.
The quasi-1D S = 1/2 antiferromagnet CuGeO3 undergoes a spin-Peierls transition to a dimerised singlet quantum ground state, with S = 1 carrying pairs of domain walls as elementary excitations....
Inelastic neutron polarization analysis (2003)
Regnault, L. P., Ronnow, H. M., Lorenzo, J. E., Bellissent, R., Tasset, F.
We will review recent results obtained by longitudinal polarization analysis (LPA) and spherical neutron polarimetry (SNP) on typical "low-dimensional" strongly correlated electronic systems...
Structural and Magnetic Instabilities of La$_{2-x}$Sr$_x$CaCu$_2$O$_6$ (2002)
Ulrich, C., Kondo, S., Reehuis, M., He, H., Bernhard, C., Niedermayer, C., ...
A neutron scattering study of nonsuperconducting La$_{2-x}$Sr$_x$CaCu$_2$O$_6$ (x=0 and 0.2), a bilayer copper oxide without CuO chains, has revealed an unexpected tetragonal-to-orthorhombic...
Structural and magnetic instabilities of La2-xSrxCaCu2O6 (2002)
Ulrich, C., Kondo, S., Reehuis, M., He, H., Bernhard, C., Niedermayer, C., ...
This version is available at the following Publisher URL: http://prb.aps.org
Structural and magnetic instabilities of La2-xSrxCaCu2O6 (2002)
Ulrich, C., Kondo, S., Reehuis, M., He, H., Bernhard, C., Niedermayer, C., ...
A neutron-scattering study of nonsuperconducting La2-xSrxCaCu2O6 (x=0 and 0.2), a bilayer copper oxide without CuO chains, has revealed an unexpected tetragonal-to-orthorhombic transition with a...
Lake, B., Ronnow, H. M., Christensen, N. B., Aeppli, G., Lefmann, K., McMorrow, D. F., ...
One view of the high-transition-temperature (high-T-c) copper oxide superconductors is that they are conventional superconductors where the pairing occurs between weakly interacting quasi-particles...
Field-induced antiferromagnetism in the high-temperature superconductor La2-xSrxCuO4 (2002)
Lake, B., Mason, T. E., Aeppli, G., Lefmann, K., Christensen, N. B., McMorrow, D. F., ...
Vortex magnetism in the high-temperatures superconductor La2-xSrxCuO4 (2002)
Lake, B., Mason, T. E., Aeppli, G., Lefmann, K., Christensen, N. B., McMorrow, D. F., ...
Ronnow, H.M., McMorrow, D.F., Coldea, R., Harrison, A., Youngson, I.D., Perring, T.G., ...
The magnetic excitation spectrum in the two-dimensional (2D) S = 1/2 Heisenberg antiferromagnet copper deuteroformate tetradeuterate has been measured for temperatures up to T∼J/2, where J =...
Antiferromagnetic vortex state in a high-temperature superconductor (2001)
Lake, B., Ronnow, H. M., Christensen, N. B., Aeppli, G., Lefmann, K., McMorrow, D. F., ...
There is strong evidence that magnetic interactions play a crucial role in the mechanism driving high-temperature superconductivity in cuprate superconductors. To investigate this further we have...
Spin dynamics of the model 2D quantum antiferromagnet CFTD (2001)
Ronnow, H. M., McMorrow, D. F., Coldea, R., Harrison, A., Youngson, I. D., Perring, T. G., ...
The magnetic excitation spectrum in the two-dimensional (2D) S=1/2 Heisenberg antiferromagnet copper deuteroformate tetradeuterate (CFTD) has been measured for temperatures up to T\sim J/2, where...
X-ray resonant scattering study of the quadrupolar order in UPd3 (2001)
McMorrow, D F, McEwen, K A, Steigenberger, U, Ronnow, H M, Yakhou, F
Correlations and fluctuations in the 2D Heisenberg antiferromagnet (2001)
Ronnow, H M, McMorrow, D F, Harrison, A, Youngson, I D, Coldea, R, Perring, T G, ...
Correlations and fluctuations in the 2D Heisenberg antiferromagnet (2001)
Ronnow, H. M., McMorrow, D. F., Harrison, A., Youngson, I. D., Coldea, R., Perring, T. G., ...
The correlations and fluctuations in Cu(DCOO)(2). 4D(2)O, which is a good physical realization of the 2D S = 1/2 Heisenberg antiferromagnet on a square lattice, have been measured by neutron...
Ronnow, H. M., McMorrow, D. F., Coldea, R., Harrison, A., Youngson, I. D., Perring, T. G., ...
The magnetic excitation spectrum in the two-dimensional (2D) S = 1/2 Heisenberg antiferromagnet copper deuteroformate tetradeuterate has been measured for temperatures up to T similar to J/2, where J...
X-ray resonant scattering study of the quadrupolar order in UPd3 (2001)
McMorrow, D. F., McEwen, K. A., Steigenberger, U., Ronnow, H. M., Yakhou, F.
Quadrupolar ordering in a 5f electron system has been observed directly for the first time, using x-ray scattering techniques. In UPd3 at low temperatures satellite peaks appear at (1, 0, l)...
Statics and dynamics of the magnetic soliton lattice in the high-field phase of CuGeO3 (2001)
Enderle, M., Ronnow, H. M., McMorrow, D. F., Regnault, L. P., Vorderwisch, P., Meissner, M., ...
Driven by antiferromagnetic quantum fluctuations on a deformable lattice, spin-Peierls systems dimerize magnetically and structurally at low temperatures. In this dimer phase all excitations with...
Excitations of the field-induced quantum soliton lattice in CuGeO3 (2001)
Enderle, M., Ronnow, H. M., McMorrow, D. F., Regnault, L. P., Dhalenne, G., Revcholevschi, A., ...
The incommensurate magnetic soliton lattice in the high-field phase of a spin-Peierls system results from quantum fluctuations. We have used neutron scattering techniques to study CuGeO3, allowing us...
Mortensen, Niels Asger, Ronnow, H. M., Bruus, Henrik, Hedegard, Per
The magnetic resonance at 41 meV observed in neutron scattering studies of Y Ba_2 Cu_3 O_7 holds a key position in the understanding of high-T_c superconductivity. Within the SO(5) model for...
Quantum renormalization of high-energy excitations in the 2D Heisenberg model (2000)
Syljuasen, O. F., Ronnow, H. M.
We find using Monte Carlo simulations of the spin-1/2 2D square lattice nearest neighbour quantum Heisenberg antiferromagnet that the high-energy peak locations at (pi, 0) and (pi/2, pi/2) differ by...
Magnetic correlations in the 2D S=5/2 honeycomb antiferromagnet MnPS3 (2000)
Ronnow, H. M., Wildes, A. R., Bramwell, S. T.
MnPS3 is a quasi-2D S = 5/2 antiferromagnet on a honeycomb lattice. Using an energy integrating neutron scattering technique, we have measured the structure factor S(k) of the instantaneous magnetic...
Neutron scattering study of the incommensurate high-field phase of CuGeO3 (2000)
Ronnow, H. M., Enderle, M., McMorrow, D. F., Regnault, L. P., Dhalenne, G., Revcolevschi, A., ...
CuGeO3 is a good realization of a spin-Peierls system. Using neutron scattering, we have investigated the transition from the dimerized spin-Peierls phase to an incommensurately modulated high-field...
Neutron scattering study of the field-induced soliton lattice in CuGeO3 (2000)
Ronnow, H. M., Enderle, M., McMorrow, D. F., Regnault, L. P., Dhalenne, G., Revcolevschi, A., ...
CuGeO3 undergoes a transition from a spin-Peierls phase to an incommensurate phase at a critical field of H-c approximate to 12.5 T. In the high-field phase a lattice of solitons forms, with both...
Mortensen, N. A., Ronnow, H. M., Bruus, H., Hedegard, P.
The magnetic resonance at 41 meV observed in neutron scattering studies of YBa2Cu3O7 holds a key position in the understanding of high-T-c, superconductivity. Within the SO(5) model for...
Added flexibility in triple axis spectrometers: the two RITAs at Riso (2000)
Lefmann, K., McMorrow, D. F., Ronnow, H. M., Nielsen, K., Clausen, K. N., Lake, B., ...
The cold-neutron triple-axis spectrometer RITA-I at Rise has been operational for about three years, and in the near future an improved version, RITA-2 will replace the existing triple-axis...
Neutron scattering study of the field-induced soliton lattice in CuGeO$_3$ (1999)
Ronnow, H. M., Enderle, M., McMorrow, D. F., Dhalenne, G., Revcolevschi, A., ...
CuGeO$_3$ undergoes a transition from a spin-Peierls phase to an incommensurate phase at a critical field of $H_c\approx 12.5$ T. In the high-field phase a lattice of solitons forms, with both...
Ronnow, H. M., McMorrow, D. F., Harrison, A.
The temperature dependence of the structure factor S(k) of the instantaneous magnetic fluctuations in copper formate tetradeuterate has been investigated using neutron scattering techniques. Our data...
This paper has been withdrawn by the author due to an error in the data-analysis.