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research article

Pressure dependence of the large-polaron transport in anatase TiO2 single crystals

Jacimovic, Jacim  
•
Vaju, Cristian  
•
Magrez, Arnaud  
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2012
Europhysics Letters

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

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Type
research article
DOI
10.1209/0295-5075/99/57005
Author(s)
Jacimovic, Jacim  
Vaju, Cristian  
Magrez, Arnaud  
Berger, Helmuth  
Forro, L.  
Gaal, Richard  
Cerovski, Viktor
Zikic, Radomir  
Date Issued

2012

Publisher

Epl Association, European Physical Society

Published in
Europhysics Letters
Volume

99

Issue

5

Article Number

57005

Subjects

Anatase, Large polarons

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LPMC  
LPCM  
Available on Infoscience
September 22, 2012
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/85627
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