Mesoscopic Phase Coherence in a Quantum Spin Fluid (2008)
Xu, Guangyong, Broholm, C., Soh, Yeong-Ah, Aeppli, G., DiTusa, J. F., Chen, Ying, ...
Mesoscopic quantum phase coherence is important because it improves the prospects for handling quantum degrees of freedom in technology. Here we show that the development of such coherence can be...
Complex Spin Structures and Origin of the Magneto-Electric Coupling in YMn2O5 (2008)
Park, S. I., Kenzelmann, M., Schefer, J., ...
By combining neutron four-circle diffraction and polarized neutron diffraction techniques we have determined the complex spin structures of a multiferroic, YMn2O5, that exhibits two ferroelectric...
Effect of Inversion Symmetry on Incommensurate Order in Multiferroic RMn2O5, R=rare earth (2008)
Harris, A. B., Kenzelmann, M., Aharony, Amnon, Entin-Wohlman, O.
Starting from the irreducible representations of the group of the wave vector we construct the spin wave functions consistent with inversion symmetry, neglected in the usual representation analysis....
Direct transition from a disordered to a multiferroic phase on a triangular lattice (2007)
Kenzelmann, M., Lawes, G., Harris, A. B., Gasparovic, G., Broholm, C., Ramirez, A. P., ...
Competing interactions and geometric frustration provide favourable conditions for exotic states of matter. Such competition often causes multiple phase transitions as a function of temperature and...
Chen, Y., Stone, M. B., Kenzelmann, M., Batista, C. D., Reich, D. H., Broholm, C.
Field-dependent specific heat and neutron scattering measurements were used to explore the antiferromagnetic S=1/2 chain compound CuCl2 * 2((CD3)2SO). At zero field the system acquires magnetic...
Comment on: "Ferroelectricity in spiral magnets" (2006)
There is much interest in the physics of materials that show a strong coupling between magnetic and electric degrees of freedom. In a recent paper by Mostovoy a theory is presented that is based on...
Neutron scattering from a coordination polymer quantum paramagnet (2006)
Hong, Tao, Kenzelmann, M., Turnbull, M. M., Landee, C. P., Lewis, B. D., Schmidt, K. P., ...
Inelastic neutron scattering measurements are reported for a powder sample of the spin-1/2 quantum paramagnet $\rm Cu(Quinoxaline)Br_2$. Magnetic neutron scattering is identified above an energy gap...
RNA: Networks & imaging (2006)
Kenzelmann, M., Rippe, K., Mattick, J. S.
The past few years have brought about a fundamental change in our understanding and definition of the RNA world and its role in the functional and regulatory architecture of the cell. The discovery...
Field dependence of magnetic ordering in Kagome-staircase compound Ni3V2O8 (2005)
Kenzelmann, M., Harris, A. B., Aharony, A., Entin-Wohlman, O., Yildirim, T., Huang, Q., ...
We present powder and single-crystal neutron diffraction and bulk measurements of the Kagome-staircase compound Ni3V2O8 (NVO) in fields up to 8.5T applied along the c-direction. (The Kagome plane is...
Magnetic inversion symmetry breaking and ferroelectricity in TbMnO3 (2005)
Kenzelmann, M., Harris, A. B., Jonas, S., Broholm, C., Schefer, J., Kim, S. B., ...
TbMnO3 is an orthorhombic insulator where incommensurate spin order for temperature T_N < 41K is accompanied by ferroelectric order for T < 28K. To understand this, we establish the magnetic...
Magnetically driven ferroelectric order in Ni$_3$V$_2$O$_8$ (2005)
Lawes, G., Harris, A. B., Kimura, T., Rogado, N., Cava, R. J., Aharony, A., ...
We show that for Ni$_3$V$_2$O$_8$ long-range ferroelectric and incommensurate magnetic order appear simultaneously in a single phase transition. The temperature and magnetic field dependence of the...
Kenzelmann, M., Batista, C. D., Chen, Y., Broholm, C., Reich, D. H., Park, S., ...
We report an experimental and theoretical study of the antiferromagnetic S=1/2 chain subject to uniform and staggered fields. Using inelastic neutron scattering, we observe a novel bound-spinon state...
Magnetic Order and Spin Dynamics in Ferroelectric HoMnO$_{3}$ (2005)
Vajk, O. P., Kenzelmann, M., Lynn, J. W., Kim, S. B.
Hexagonal HoMnO$_{3}$ is a frustrated antiferromagnet (T$_{N}$=72 K) ferroelectric (T$_{C}$=875 K) in which these two order parameters are coupled. Our neutron measurements of the spin wave...
Competing Magnetic Phases on a "Kagome Staircase" (2004)
Lawes, G., Kenzelmann, M., Rogado, N., Kim, K. H., Jorge, G. A., Cava, R. J., ...
We present thermodynamic and neutron data on Ni_3V_2O_8, a spin-1 system on a kagome staircase. The extreme degeneracy of the kagome antiferromagnet is lifted to produce two incommensurate phases at...
Bound spinons in an antiferromagnetic S=1/2 chain with a staggered field (2003)
Kenzelmann, M., Chen, Y., Broholm, C., Reich, D. H., Qiu, Y.
Inelastic neutron scattering was used to measure the magnetic field dependence of spin excitations in the antiferromagnetic S=1/2 chain CuCl_2 2(dimethylsulfoxide) (CDC) in the presence of uniform...
Analysis of CREM-dependent gene expression during mouse spermatogenesis. (2003)
Beissbarth, T., Borisevich, I., Horlein, A., Kenzelmann, M., Hergenhahn, M., Klewe-Nebenius, A., ...
Structure of end states for a Haldane Spin Chain (2002)
Kenzelmann, M., Xu, G., Zaliznyak, I. A., Broholm, C., DiTusa, J. F., Aeppli, G., ...
Inelastic neutron scattering was used to probe edge states in a quantum spin liquid. The experiment was performed on finite length antiferromagnetic spin-1 chains in Y_2BaNi_{1-x}Mg_xO_5. At finite...
Kenzelmann, M., Coldea, R., Tennant, D. A., Visser, D., Hofmann, M., Smeibidl, P., ...
We explore the effects of noncommuting applied fields on the ground-state ordering of the quasi-one-dimensional spin-1/2 XY-like antiferromagnet Cs2CoCl4 using single-crystal neutron diffraction. In...
Exact diagonalization calculations of finite antiferromagnetic spin-1 Heisenberg chains at finite temperatures are presented and compared to a recent inelastic neutron scattering experiment for...
Kenzelmann, M., Cowley, R. A., Buyers, W. J. L., Coldea, R., Enderle, M., McMorrow, D. F.
We have mapped from the quantum to the classical limit the spin excitation spectrum of the antiferromagnetic spin-1 Heisenberg chain system CsNiCl3 in its paramagnetic phase from T=5 to 200K. Neutron...
Kenzelmann, M., Cowley, R. A., Buyers, W. J. L., Tun, Z., Coldea, R., Enderle, M.
We report inelastic time-of-flight and triple-axis neutron scattering measurements of the excitation spectrum of the coupled antiferromagnetic spin-1 Heisenberg chain system CsNiCl3. Measurements...
Spin dynamics in the $S=1/2$ weakly-coupled chains antiferromagnet BaCu$_2$Si$_2$O$_7$ (2001)
Zheludev, A., Kenzelmann, M., Raymond, S., Masuda, T., Uchinokura, K.
Inelastic neutron scattering is used to identify single-particle and continuum spin excitations in the quasi-one-dimensional $S=1/2$ antiferromagnet \ba. In the data analysis, close attention is...
Kenzelmann, M., Zheludev, A., Raymond, S., Ressouche, E., Masuda, T., Böni, P., ...
Elastic and inelastic neutron scattering were used to study the ordered phase of the quasi-one-dimensional spin-1/2 antiferromagnet ${\rm BaCu_{2}Si_{2}O_{7}}$. The previously proposed model for the...
Temperature Evolution of the Quantum Gap in CsNiCl3 (2000)
Kenzelmann, M., Cowley, R. A., Buyers, W. J. L., McMorrow, D. F.
Neutron scattering measurements on the one-dimensional gapped S=1 antiferromagnet, CsNiCl3, have shown that the excitation corresponding to the Haldane mass gap Delta at low temperatures persists as...
Multi-particle States in Spin-1 Chain System CsNiCl3 (2000)
Kenzelmann, M., Cowley, R. A., Buyers, W. J. L., Coldea, R., Gardner, J. S., Enderle, M., ...
A continuum of magnetic states has been observed by neutron scattering from the spin-1 chain compound CsNiCl3 in its disordered gapped one-dimensional phase. Results using both triple-axis and...
Zheludev, A., Kenzelmann, M., Raymond, S., Ressouche, E., Masuda, T., Kakurai, K., ...
Inelastic neutron scattering is used to study transverse-polarized magnetic excitations in the quasi-one-dimensional S=1/2 antiferromagnet BaCu_2Si_2O_7, where the saturation value for the N\'eel...
The efficiency of the original SAGE (Serial Analysis of Gene Expression) protocol was limited by a small average size of cloned concatemers. We describe a modification of the technique that overcomes...
Microarray analysis of newly synthesized RNA in cells and animals
Kenzelmann, M., Maertens, S., Hergenhahn, M., Kueffer, S., Hotz-Wagenblatt, A., Li, L., ...
Current methods to analyze gene expression measure steady-state levels of mRNA. To specifically analyze mRNA transcription, we have developed a technique that can be applied in vivo in intact cells...