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Title: Effect of bond fluctuations on the transport properties of manganites and nickelates

Abstract

For the manganites RMnO{sub 3} (R = La, Pr, Nd), a mechanism is proposed to explain the anomalous temperature dependences of the kinetic coefficients, resistivity, and thermoelectric power during the transition from the pseudocubic O to the orthorhombic O' crystal structure. The contributions of the bending and stretching modes of the octahedron to the formation of thermal-conductivity maxima and to the deviation from the linear dependence of ln({rho}/T) on 1/T at low temperatures have been estimated. In nickelates, the metal-insulator transition is caused by lattice-polaron pinning by the stretching mode of the octahedron, and the low-temperature anomaly of the thermal conductivity is related to electron scattering by the bending mode of the octahedron.

Authors:
 [1]
  1. Russian Academy of Sciences, Kirensky Institute of Physics, Siberian Division (Russian Federation), E-mail: apl@iph.krasn.ru
Publication Date:
OSTI Identifier:
21072476
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Experimental and Theoretical Physics; Journal Volume: 104; Journal Issue: 5; Other Information: DOI: 10.1134/S1063776107050111; Copyright (c) 2007 Nauka/Interperiodica; Article Copyright (c) 2007 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ELECTRON DIFFRACTION; LANTHANUM COMPOUNDS; MANGANATES; NEODYMIUM COMPOUNDS; NICKELATES; ORTHORHOMBIC LATTICES; PRASEODYMIUM COMPOUNDS; TEMPERATURE DEPENDENCE; THERMAL CONDUCTIVITY

Citation Formats

Aplesnin, S. S. Effect of bond fluctuations on the transport properties of manganites and nickelates. United States: N. p., 2007. Web. doi:10.1134/S1063776107050111.
Aplesnin, S. S. Effect of bond fluctuations on the transport properties of manganites and nickelates. United States. doi:10.1134/S1063776107050111.
Aplesnin, S. S. Tue . "Effect of bond fluctuations on the transport properties of manganites and nickelates". United States. doi:10.1134/S1063776107050111.
@article{osti_21072476,
title = {Effect of bond fluctuations on the transport properties of manganites and nickelates},
author = {Aplesnin, S. S.},
abstractNote = {For the manganites RMnO{sub 3} (R = La, Pr, Nd), a mechanism is proposed to explain the anomalous temperature dependences of the kinetic coefficients, resistivity, and thermoelectric power during the transition from the pseudocubic O to the orthorhombic O' crystal structure. The contributions of the bending and stretching modes of the octahedron to the formation of thermal-conductivity maxima and to the deviation from the linear dependence of ln({rho}/T) on 1/T at low temperatures have been estimated. In nickelates, the metal-insulator transition is caused by lattice-polaron pinning by the stretching mode of the octahedron, and the low-temperature anomaly of the thermal conductivity is related to electron scattering by the bending mode of the octahedron.},
doi = {10.1134/S1063776107050111},
journal = {Journal of Experimental and Theoretical Physics},
number = 5,
volume = 104,
place = {United States},
year = {Tue May 15 00:00:00 EDT 2007},
month = {Tue May 15 00:00:00 EDT 2007}
}