Raman resonance in spin S two-leg ladder systems

Abstract

We argue that the Raman intensity in a spin S two-leg spin-ladder has a pseudo-resonance peak, whose width is very small at large S. The pseudo-resonance originates from the existence of a local minimum in the magnon excitation spectrum, and is located slightly below twice the magnon energy at the minimum. The physics behind the peak is similar to the excitonic scenario for the neutron and Raman resonances in a d-wave superconductor.

4 pages, 4 figures, submitted to PRB

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Cited by in corpus (2)

• Nonanalytic paramagnetic response of itinerant fermions away and near a ferromagnetic quantum phase transition
• Breathers and Raman scattering in a two-leg ladder with staggered Dzialoshinskii-Moriya interaction