Sound-wave anomalies in SrCu2(BO3)(2)

Article

关键词: SPIN SYSTEM SRCU2(BO3)(2);    DIMER GROUND-STATE;    MAGNETIZATION PLATEAUS;    CHAINS;   

DOI  :  10.1103/PhysRevB.62.R6097

来源: SCIE

【 摘 要 】

The temperature and high magnetic field dependence of the longitudinal sound-wave mode cll in the two-dimensional dimer system SrCu2(BO3)(2) is presented. c(11)(T) shows anomalies due to strong interdimer spin-strain coupling. We can quantitatively interpret the temperature dependence of c(11)(T) together with the magnetic susceptibility chi(m)(T) with a molecular field approximation of coupled dimer triplets. The sound velocity up to 50 T shows very sharp softening between the magnetization plateaus at low temperature, We argue that these pronounced effects arise from a resonant interaction between the phonons and the magnetic excitations which show softening between the plateaus.

【 授权许可】

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