Anisotropic transport in the quasi-one-dimensional semiconductor Li0.33MoO3

S. Moshfeghyeganeh, A. N. Cote, J. J. Neumeier, Joshua Cohn

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1 Scopus citations

Abstract

Transport measurements (electrical resistivity, Seebeck coefficient, and thermal conductivity) in the temperature range 80-500 K are presented for single crystals of the quasi-one-dimensional (Q1D) semiconductor Li0.33MoO3. Opposite signs are observed for the Seebeck coefficient along the trinclinic a and c axes, with Sc - Sa ≃ 250 μV/K near room temperature and ≃100 μV/K at 380 K. The thermal conductivity at room temperature in the a-c planes was ∼2 W/m K and ∼10 times smaller along b∗. A weak structural anomaly at Ts ≈ 355 K, identified in the temperature-dependent lattice constants, coincides with anomalies in the electrical properties. Analysis of the electronic transport at T > Ts favors an intrinsic semiconductor picture for transport along the most conducting Q1D axis and small-polaronic transport along the other directions, providing insight into the origin of the Seebeck anisotropy.

Original languageEnglish (US)
Article number095105
JournalJournal of Applied Physics
Volume119
Issue number9
DOIs
StatePublished - Mar 7 2016

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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