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

Abstract

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.

4 pages, 3 figures, inpress in JPCS as a proceeding of LT26

References in corpus (4)

• Quantum Magnets under Pressure: Controlling Elementary Excitations in TlCuCl3
• Field- and pressure-induced magnetic quantum phase transitions in TlCuCl_3
• Pressure-Induced Magnetic Quantum Phase Transition in Gapped Spin System KCuCl3
• Magnetic field-induced one-magnon Raman scattering in the magnon Bose-Einstein condensation phase of TlCuCl${}_3$

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