Semiconducting nature and thermal transport studies of ZrTe3

JOURNAL OF ALLOYS AND COMPOUNDS

卷:785

Article

Hooda, M. K.¹  Tripathi, T. S.²  Yadav, C. S.¹ 

[1] Indian Inst Technol Mandi, Sch Basic Sci, Mandi 175005, HP, India

[2] Aalto Univ, Dept Chem & Mat Sci, FI-0076 Aalto, Finland

关键词: Electrical transport;    Electronic properties;    Transition metal alloys and compounds;   

DOI  :  10.1016/j.jallcom.2019.01.136

来源: Elsevier

【 摘 要 】

We report electrical and thermal transport properties of polycrystalline ZrTe3. The polycrystalline sample shows semiconducting behavior in contrast to the established semi-metallic character of the compound. However the charge density wave (CDW) transition remains intact and its clear signatures are observed in thermal conductivity and Seebeck coefficient, in the wide temperature range 50-100 K. The thermal conductivity points to additional scattering from the low frequency phonons (phonon softening) in the vicinity of CDW transition. The transport in the polycrystalline compounds is governed by smaller size polarons in the variable range hopping (VRH) region. However, the increasing disorder in polycrystalline compounds suppresses the CDW transition. The VRH behavior is also observed in the Seebeck coefficient data in the similar temperature range. The Seebeck coefficient suggests a competition between the charge carriers (electrons and holes). (C) 2019 Elsevier B.V. All rights reserved.

【 授权许可】

Free