Raman resonance in spin S two-leg ladder systems

Details Raman resonance in spin S two-leg ladder systems Raman resonance in spin S two-leg ladder systems

2005-03-17

arxiv.org/abs/cond-mat/0503453v1

Phys. Rev. B vol 71, 224431 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures, submitted to PRB

Scientific paper

10.1103/PhysRevB.71.224431

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.

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