Raman scattering on the spin-Peierls compound α′-NaV2O5

被引：8

作者：

Fischer, M

Lemmens, P

Guntherodt, G

Weiden, M

Hauptmann, R

Geibel, C

Steglich, F

机构：

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

[2] TH Darmstadt, FB Tech Phys, D-64289 Darmstadt, Germany

来源：

PHYSICA B | 1998年 / 244卷

关键词：

spin-Peierls transition; alpha '-NaV2O5; Raman spectroscopy;

D O I：

10.1016/S0921-4526(97)00465-1

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

By means of Raman scattering, we investigated single-crystalline samples of the new inorganic spin-Peierls compound alpha'-NaV2O5 = 34 with T-SP = 34 K. Phonons with anomalous broad line shape indicating a strong spin-phonon coupling above T-SP were detected. Below T-SP several additional modes could be observed. Different temperature dependencies of these modes are interpreted as a first hint that low-energy modes are related to the opening of the spin-Peierls gap observed in neutron scattering experiments while other modes are related to the lowering of the lattice symmetry due to the spin-Peierls transition. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：76 / 80

页数：5

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