Local symmetry breaking in K2V3O8 as studied by infrared spectroscopy -: art. no. 054101

被引：12

作者：

Choi, J ^{[1
]}

Zhu, ZT

Musfeldt, JL

Ragghianti, G

Mandrus, D

Sales, BC

Thompson, JR

机构：

[1] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA

[2] Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA

[3] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

来源：

PHYSICAL REVIEW B | 2002年 / 65卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.65.054101

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the vibrational properties of quasi-two-dimensional K2V3O8 as a function of temperature. Based on the splitting of the 990-cm(-1) c-axis phonon mode into a doublet, we conclude that the 110-K transition is driven by a local distortion of the VO5 square pyramids. At lower temperature, red shifting of two ab-plane phonon modes motivates us to identify an additional, more modest relaxation near 60 K. These observations are supported by an analysis of the electronic structure as well as other physical-property measurements including the permittivity, specific beat, and magnetization.

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页码：1 / 6

页数：6

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