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
收藏
页码：76 / 80
页数：5
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