Tacon, M. Le, Forrest, T. R., Rüegg, Ch., Bosak, A., Walters, A. C., Mittal, R., ...
We report inelastic x-ray scattering experiments on the lattice dynamics in SmFeAsO and superconducting SmFeAsO$_{0.6}$F$_{0.35}$ single crystals. Particular attention was paid to the dispersions...
Field-induced magnetic phases and electric polarization in LiNiPO4 (2009)
Jensen, T. B. S., Christensen, N. B., Kenzelmann, M., Rønnow, H. M., Niedermayer, C., Andersen, N. H., ...
Neutron diffraction is used to probe the (H,T) phase diagram of magneto-electric (ME) LiNiPO4 for magnetic fields along the c-axis. At zero field the Ni spins order in two antiferromagnetic phases....
Schlappa, J., Schmitt, T., Vernay, F., Strocov, V. N., Ilakovac, V., Thielemann, B., ...
We investigate magnetic excitations in the spin-ladder compound Sr$_{14}$Cu$_{24}$O$_{41}$ using high-resolution Cu $L_3$-edge Resonant Inelastic X-ray Scattering (RIXS). Our findings demonstrate...
Field-induced magnetic phases and electric polarization in LiNiPO4 (2009)
N.B. Christensen, M. Kenzelmann, H.M. Rønnow, C. Niedermayer, ...
Journal article
Direct Observation of Magnon Fractionalization in the Quantum Spin Ladder (2008)
Thielemann, B., Rüegg, Ch., Rønnow, H. M., Läuchli, A. M., Normand, B., ...
We measure by inelastic neutron scattering the spin excitation spectra as a function of applied magnetic field in the quantum spin-ladder material (C5H12N)2CuBr4. Discrete magnon modes at low fields...
Field-Controlled Magnetic Order in the Quantum Spin-Ladder System (Hpip)2CuBr4 (2008)
Thielemann, B., Rüegg, Ch., Kiefer, K., Rønnow, H. M., Normand, B., Bouillot, P., ...
Neutron diffraction is used to investigate the field-induced, antiferromagnetically ordered state in the two-leg spin-ladder material (Hpip)2CuBr4. This "classical" phase, a consequence of weak...
Polarons and confinement of electronic motion to two dimensions in a layered manganite (2006)
Rønnow, 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...
Quantum helimagnetism of the frustrated spin-1/2 chain LiCuVO4 (2005)
Enderle,M., Mukherjee,C., Fåk,B., Kremer,R. K., Broto,J. M., Rosner,H., ...
Quantum helimagnetism of the frustrated spin-1/2 chain LiCuVO4 (2005)
Enderle, M., Mukherjee, C., Fåk, B., Kremer, R. K., Broto, J. M., Rosner, H., ...
Quantum helimagnetism of the frustrated spin-1/2 chain LiCuVO4 (2005)
Enderle, M., Mukherjee, C., Fåk, B., Kremer, R. K., Broto, J. M., Rosner, H., ...
Lake, B., Rønnow, H.M., Christensen, N.B., Aeppli, G., Lefmann, K., McMorrow, D.F., ...
One view of the high-transition-temperature (high-Tc) copper oxide superconductors is that they are conventional superconductors where the pairing occurs between weakly interacting quasiparticles...
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...
X-Ray Resonant Scattering Study of the Quadrupolar Order in UPd3 (2001)
Yakhou, F., McEwen, K. A., McMorrow, D. F., Rønnow, H. M., Steigenberger, U.
Quantum dynamics and entanglement of spins on a square lattice
Christensen, N. B., Rønnow, 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...