Raman resonance in spin-S two-leg spin-ladder systems -: art. no. 224431

被引：2
|
作者：
Donkov, A
Chubukov, AV
机构：
[1] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA
[2] Univ Maryland, Dept Phys, College Pk, MD 20742 USA
[3] Univ Maryland, Condensed Matter Theory Ctr, College Pk, MD 20742 USA
来源：
PHYSICAL REVIEW B | 2005年 / 71卷 / 22期
关键词：
D O I：
10.1103/PhysRevB.71.224431
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We argue that the Raman intensity in a spin-S two-leg spin ladder has a pseudoresonance peak, whose width is very small at large S. The pseudoresonance 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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页数：4
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