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Title: Suppression of thermopower of Na xCoO 2 by an external magnetic field

Abstract

We calculate the thermopower in Na{sub x}CoO{sub 2} using the standard Boltzmann transport theory and first principles electronic structures with spin polarization taken into account. The thermopower is found to be smaller when the system is polarized, which thereby provides an alternative reasonable explanation for the suppression of thermopower in a magnetic field. The role of the spin-orbit coupling on the thermoelectricity is also discussed.

Authors:
 [1];  [2]
  1. North Carolina State University
  2. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
968239
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 76; Journal Issue: 19
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; 36 MATERIALS SCIENCE; COBALT OXIDES; SODIUM OXIDES; BOLTZMANN EQUATION; DENSITY FUNCTIONAL METHOD; ELECTRONIC STRUCTURE; MAGNETIC FIELDS; POLARIZATION; SPIN; THERMOELECTRICITY; TRANSPORT THEORY; L-S COUPLING

Citation Formats

Xiang, H. J., and Singh, David J. Suppression of thermopower of NaxCoO2 by an external magnetic field. United States: N. p., 2007. Web. doi:10.1103/PhysRevB.76.195111.
Xiang, H. J., & Singh, David J. Suppression of thermopower of NaxCoO2 by an external magnetic field. United States. doi:10.1103/PhysRevB.76.195111.
Xiang, H. J., and Singh, David J. Mon . "Suppression of thermopower of NaxCoO2 by an external magnetic field". United States. doi:10.1103/PhysRevB.76.195111.
@article{osti_968239,
title = {Suppression of thermopower of NaxCoO2 by an external magnetic field},
author = {Xiang, H. J. and Singh, David J},
abstractNote = {We calculate the thermopower in Na{sub x}CoO{sub 2} using the standard Boltzmann transport theory and first principles electronic structures with spin polarization taken into account. The thermopower is found to be smaller when the system is polarized, which thereby provides an alternative reasonable explanation for the suppression of thermopower in a magnetic field. The role of the spin-orbit coupling on the thermoelectricity is also discussed.},
doi = {10.1103/PhysRevB.76.195111},
journal = {Physical Review Letters},
number = 19,
volume = 76,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}