Charge-density-wave transitions in 1T-VSe2

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, , Citation D J Eaglesham et al 1986 J. Phys. C: Solid State Phys. 19 359 DOI 10.1088/0022-3719/19/3/006

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1 H.H. Wills Phys. Lab., Bristol Univ., UK

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0022-3719/19/3/359

Abstract

An electron diffraction and imaging study of charge-density-wave phases in 1T-VSe2 is presented. Two phase transitions are found. At 110K a 3q-state is formed which at 80K transforms into an irregular pattern of 2q-domains. A Landau theory of these transitions is presented. In order to explain the 3q-2q transition sixth-order terms must be included in the free-energy expansion.

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