Optical absorption of spin ladders

被引：29

作者：

Jurecka, C ^{[1
]}

Brenig, W

机构：

[1] Tech Univ Braunschweig, Inst Theoret Phys, D-38106 Braunschweig, Germany

[2] Univ Calif Santa Barbara, Inst Theoret Phys, Santa Barbara, CA 93106 USA

来源：

PHYSICAL REVIEW B | 2000年 / 61卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.61.14307

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a theory of phonon-assisted optical two-magnon absorption in two-leg spin ladders. Based on the strong intra-rung-coupling limit we show that collective excitations of total spin S = 0, 1, and 2 exist outside of the two-magnon continuum. It is demonstrated that the singlet collective state has a clear signature in the optical spectrum.

引用

页码：14307 / 14310

页数：4

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