research article
Pressure dependence of the large-polaron transport in anatase TiO2 single crystals
2012
We have measured the pressure and temperature dependences of the resistivity and the thermoelectric power of anatase, TiO2. The resistivity varies with T-3 at high temperatures, and its absolute value is in the 1 Omega cm range. Below 60 K, the resistivity is activated. Most surprisingly, the activation energy shows non-monotonic pressure dependence. The thermoelectric power has a very high value and its temperature dependence resembles that of polaronic materials. We suggest a large polaronic model to describe the temperature and pressure dependence of the two transport coefficients. Copyright (c) EPLA, 2012
Type
research article
Author(s)
Date Issued
2012
Published in
Volume
99
Issue
5
Article Number
57005
Subjects
Editorial or Peer reviewed
REVIEWED
Written at
EPFL
Available on Infoscience
September 22, 2012
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