Temperature dependence of optical spectral weights in quarter-filled ladder systems

被引：27

作者：

Aichhorn, M

Horsch, P

von der Linden, W

Cuoco, M

机构：

[1] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

[2] Graz Univ Technol, Inst Theoret Phys, A-8010 Graz, Austria

[3] INFM Salerno, Dipartimento Sci Fis ER Caianiello, I-84081 Baronissi, Italy

来源：

PHYSICAL REVIEW B | 2002年 / 65卷 / 20期

关键词：

D O I：

10.1103/PhysRevB.65.201101

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The temperature dependence of the integrated optical conductivity I(T) reflects the changes of the kinetic energy as spin and charge correlations develop. We calculated I(T) in the frame of a t-J-V model for ladder systems, such as alpha(')-NaV2O5, and show that the measured strong T dependence of I(T) for NaV2O5 can be explained by the destruction of short-range antiferromagnetic correlations. Thus I(T) provides detailed information about the T dependence of superexchange energy and thereby allows for an independent determination of magnetic energy scales.

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页码：1 / 4

页数：4

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