Electron-phonon and spin-phonon coupling in NaV2O5:: Charge fluctuations effects

被引：32

作者：

Sherman, EY ^{[1
]}

Fischer, M

Lemmens, P

van Loosdrecht, PHM

Güntherodt, G

机构：

[1] Rhein Westfal TH Aachen, Inst Phys 2, D-52056 Aachen, Germany

[2] Moscow Inst Phys & Technol, Dolgoprudnyi 141700, Moscow Region, Russia

来源：

EUROPHYSICS LETTERS | 1999年 / 48卷 / 06期

关键词：

D O I：

10.1209/epl/i1999-00533-6

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that the asymmetric crystal environment, of the V site in the ladder compound NaV2O5 leads to a strong coupling of vanadium 3d electrons to phonons. This coupling causes fluctuations of the charge on the V ions, and favors a transition to a charge-ordered state at low temperatures. In the low temperature pha se the charge fluctuations modulate the spin-spin superexchange interaction, resulting in a strong spin-phonon coupling.

引用

页码：648 / 654

页数：7

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