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

doi:10.1103/PhysRevLett.98.167202

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

Direct Geometry

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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 language	English
Article number	167202
Journal	Physical Review Letters
Volume	98
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevLett.98.167202
State	Published - Apr 19 2007

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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.",

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AU - Garlea, V. O.

AU - Zheludev, A.

AU - Masuda, T.

AU - Manaka, H.

AU - Regnault, L. P.

AU - Ressouche, E.

AU - Grenier, B.

AU - Chung, J. H.

AU - Qiu, Y.

AU - Habicht, K.

AU - Kiefer, K.

AU - Boehm, M.

PY - 2007/4/19

Y1 - 2007/4/19

N2 - 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.

AB - 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.

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

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