Evidence of coupling between phonons and charge-density waves in ErTe3

被引：29

作者：

Lazarevic, N. ^{[1
]}

Popovic, Z. V. ^{[1
]}

Hu, Rongwei ^{[2
]}

Petrovic, C. ^{[2
]}

机构：

[1] Univ Belgrade, Inst Phys, Ctr Solid State Phys & New Mat, Belgrade 11080, Serbia

[2] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW B | 2011年 / 83卷 / 02期

关键词：

RARE-EARTH-ELEMENT; OPTICAL PHONONS; RETE3; RE;

D O I：

10.1103/PhysRevB.83.024302

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The vibrational properties of ErTe3 were investigated using Raman spectroscopy and were analyzed on the basis of peculiarities of the RTe3 crystal structure. Four Raman active modes for the undistorted structure, predicted by factor-group analysis, are experimentally observed and assigned according to diperiodic symmetry of the ErTe3 layer. By analyzing temperature dependence of the Raman mode energy and intensity, we have provided clear evidence that all Raman modes, active in the normal phase, are coupled to the charge-density waves. In addition, new modes have been observed in the distorted state.

引用

页数：5

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