Excitations from a Bose-Einstein condensate of magnons in coupled spin ladders

V. O. Garlea, A. Zheludev, T. Masuda, H. Manaka, L. P. Regnault, E. Ressouche, B. Grenier, J. H. Chung, Y. Qiu, K. Habicht, K. Kiefer, M. Boehm

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Abstract

The weakly coupled quasi-one-dimensional spin ladder compound (CH3)2CHNH3CuCl3 is studied by neutron scattering in magnetic fields exceeding the critical field of Bose-Einstein condensation of magnons. Commensurate long-range order and the associated Goldstone mode are detected and found to be similar to those in reference to spin-dimer materials. However, for the upper two massive magnon branches, the observed behavior is totally different, culminating in a drastic collapse of excitation bandwidth beyond the transition point.

Original languageEnglish
Article number167202
JournalPhysical review letters
Volume98
Issue number16
DOIs
Publication statusPublished - 2007 Apr 19

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Garlea, V. O., Zheludev, A., Masuda, T., Manaka, H., Regnault, L. P., Ressouche, E., Grenier, B., Chung, J. H., Qiu, Y., Habicht, K., Kiefer, K., & Boehm, M. (2007). Excitations from a Bose-Einstein condensate of magnons in coupled spin ladders. Physical review letters, 98(16), [167202]. https://doi.org/10.1103/PhysRevLett.98.167202