Raman scattering in a Heisenberg S=1/2 antiferromagnet on the anisotropic triangular lattice

Abstract

We investigate the two-magnon Raman scattering from an anisotropic S=1/2 triangular Heisenberg antiferromagnet Cs2CuCl4. We find that the Raman response is very sensitive to magnon-magnon interactions and to scattering geometries, a feature that is in remarkable contrast with the polarization-independent Raman signal from the isotropic triangular Heisenberg antiferromagnet. Since a spin-liquid ground state gives rise to a similar rotationally invariant Raman response, our results on the polarization dependence of the scattering spectrum suggest that Raman spectroscopy provides a useful probe, complementary to neutron scattering, of the ground-state properties of Cs2CuCl4, particularly whether the time-reversal symmetry is broken in the ground state.

9 pages, 6 figures

References in corpus (12)

• Ordering in spatially anisotropic triangular antiferromagnets
• Magnon Decay in Noncollinear Quantum Antiferromagnets
• Flat spin wave dispersion in a triangular antiferromagnet
• Spin dynamics of the quasi two dimensional spin-1/2 quantum magnet Cs_2CuCl_4
• How to detect weak emergent broken-symmetries of the Kagome antiferromagnet from Raman spectroscopy
• Spin Structure Factor of the Frustrated Quantum Magnet Cs_2CuCl_4
• Raman scattering in a Heisenberg {\boldmath $S=1/2$} antiferromagnet on the triangular lattice
• Theory of two magnon Raman scattering in antiferromagnetic iron pnictides
• Magnetic resonance in the ordered phases of the 2D frustrated quantum magnet Cs2CuCl4
• Elastic constants and ultrasonic attenuation in the cone state of the frustrated antiferromagnet Cs_2CuCl_4
• Field dependence of the magnetic spectrum in anisotropic and Dzyaloshinskii-Moriya antiferromagnets: II. Raman spectroscopy
• Anomalous frequency and intensity scaling of collective and local modes in a coupled spin tetrahedron system

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