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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
Authors
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Cerovski, Viktor
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Publication date
2012
Published in
Volume
99
Issue
5
Article Number
57005
Subjects
Peer reviewed
REVIEWED
Written at
EPFL
Available on Infoscience
September 22, 2012
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