1209.0235 (H. Kuroe et al.)

Longitudinal magnetic excitation in KCuCl3 studied by Raman scattering
under hydrostatic pressures    [PDF]

H. Kuroe, N. Takami, N. Niwa, T. Sekine, M. Matsumoto, F. Yamada, H. Tanaka, K. Takemura

We measure Raman scattering in an interacting spin-dimer system KCuCl3 under hydrostatic pressures up to 5 GPa mediated by He gas. In the pressure-induced quantum phase, we observe a one-magnon Raman peak, which originates from the longitudinal magnetic excitationand is observable through the second-order exchange interaction Raman process. We report the pressure dependence of the frequency, halfwidth and Raman intensity of this mode.

View original: http://arxiv.org/abs/1209.0235