Optical absorption spectra inSrCu2O3two-leg spin ladder

2003/04/15 by Nobuyasu Haga, N. HAGA, Sei-ichiro Suga
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.67.134432

5 pages, 5 figures, to appear in PRB vol. 67 (2003)

arxiv created 2003/04/15 · openalex publication_date 2003/04/28 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We calculate the phonon-assisted optical-absorption spectra in SrCu₂O₃ two-leg spin-ladder systems. The results for two models proposed for SrCu₂O₃ are compared. In the model including the effects of a cyclic four-spin interaction, the shoulder structure appears at \ensuremath∼978cm^\ensuremath-1 and the peak appears at \ensuremath∼1975cm^\ensuremath-1 in the spectrum for polarization of the electric field parallel to the legs. In the other model which describes a pure two-leg ladder, the peak appears around the lower edge of the spectrum at \ensuremath∼1344cm^\ensuremath-1. The feature can be effective in determining the proper model for SrCu₂O₃.

Citations

• Phase diagram of a spin ladder with cyclic four-spin exchange
• Fractional and Integer Excitations in Quantum Antiferromagnetic Spin1/2Ladders
• Linked cluster series expansions for two-particle bound states
• Spin dynamics and transport in gapped one-dimensional Heisenberg antiferromagnets at nonzero temperatures
• Strong-Coupling Expansions for Multiparticle Excitations: Continuum and Bound States