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Title: Thermal conductivity in large - J two-dimensional antiferromagnets: Role of phonon scattering

Abstract

Different types of relaxation processes for magnon heat current are discussed, with a particular focus on coupling to three-dimensional phonons. There is thermal conductivity by these in-plane magnetic excitations using two distinct techniques: Boltzmann formalism within the relaxation-time approximation and memory-function approach. Also considered are the scattering of magnons by both acoustic and optical branches of phonons. We demonstrate an accord between the two methods, regarding the asymptotic behavior of the effective relaxation rates. It is strongly suggested that scattering from optical or zone-boundary phonons is important for magnon heat current relaxation in a high-temperature window of ΘD≲T<< J.

Authors:
 [1];  [2]
  1. Univ. of California, Irvine, CA (United States)
  2. Technical Univ. Braunschweig (Germany)
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1209172
Grant/Contract Number:  
FG02-04ER46174
Resource Type:
Publisher's Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Volume: 92 Journal Issue: 5; Journal ID: ISSN 1098-0121: PRBMDO
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Chernyshev, A. L., and Brenig, Wolfram. Thermal conductivity in large-J two-dimensional antiferromagnets: Role of phonon scattering. United States: N. p., 2015. Web. doi:10.1103/PhysRevB.92.054409.
Chernyshev, A. L., & Brenig, Wolfram. Thermal conductivity in large-J two-dimensional antiferromagnets: Role of phonon scattering. United States. doi:10.1103/PhysRevB.92.054409.
Chernyshev, A. L., and Brenig, Wolfram. Wed . "Thermal conductivity in large-J two-dimensional antiferromagnets: Role of phonon scattering". United States. doi:10.1103/PhysRevB.92.054409.
@article{osti_1209172,
title = {Thermal conductivity in large-J two-dimensional antiferromagnets: Role of phonon scattering},
author = {Chernyshev, A. L. and Brenig, Wolfram},
abstractNote = {Different types of relaxation processes for magnon heat current are discussed, with a particular focus on coupling to three-dimensional phonons. There is thermal conductivity by these in-plane magnetic excitations using two distinct techniques: Boltzmann formalism within the relaxation-time approximation and memory-function approach. Also considered are the scattering of magnons by both acoustic and optical branches of phonons. We demonstrate an accord between the two methods, regarding the asymptotic behavior of the effective relaxation rates. It is strongly suggested that scattering from optical or zone-boundary phonons is important for magnon heat current relaxation in a high-temperature window of ΘD≲T<< J.},
doi = {10.1103/PhysRevB.92.054409},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 5,
volume = 92,
place = {United States},
year = {2015},
month = {8}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevB.92.054409

Citation Metrics:
Cited by: 7 works
Citation information provided by
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