Raman scattering for triangular lattices spin-1/2 Heisenberg antiferromagnets

• Published in: Journal of physics. Condensed matter Vol. 19; no. 14; pp. 145243 - 145243 (6)
• Main Authors: Vernay, F, Devereaux, T P, Gingras, M J P
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Bristol IOP Publishing 11.04.2007; Institute of Physics
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; General theory and models of magnetic ordering; Infrared and raman spectra and scattering; Magnetic properties and materials; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Organic compounds, polymers; Physics; Finite size effect; Polarization; Ground states; Organic conductors; Antiferromagnetic materials; Heisenberg model; Cesium chlorides; Cyano complex; Lanczos method; Triangular lattices; BEDT-TTF; Copper chlorides; Square lattices; Exchange interactions; Copper complexes; Quantum fluctuation

Motivated by various spin-1/2 compounds like Cs2CuCl4 or kappa-(BEDT-TTF)2Cu2(CN)3, we derive a Raman-scattering operator a la Shastry and Shraiman for various geometries. For T = 0, the exact spectra are computed by the Lanczos algorithm for finite-size clusters. We perform a systematic investigati...