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Title: Spin-phonon coupling in antiferromagnetic nickel oxide

Abstract

We report the results of ultraviolet Raman spectroscopy of NiO, which allowed us to determine the spin-phonon coupling coefficients in this important antiferromagnetic material. The use of the second-order phonon scattering and ultraviolet laser excitation (λ = 325 nm) was essential for overcoming the problem of the optical selection rules and dominance of the two-magnon band in the visible Raman spectrum of NiO. We established that the spins of Ni atoms interact more strongly with the longitudinal than transverse optical phonons and produce opposite effects on the phonon energies. The peculiarities of the spin-phonon coupling are consistent with the trends given by density functional theory. Lastly, the obtained results shed light on the nature of the spin-phonon coupling in antiferromagnetic insulators and can help in developing spintronic devices.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [1];  [1];  [2];  [1];  [1];  [1];  [1]
  1. Univ. of California, Riverside, CA (United States)
  2. Univ. of California, Riverside, CA (United States); Univ. Federal do Rio de Janeiro, Duque de Caxias (Brazil)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC), Washington, D.C. (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1470129
Alternate Identifier(s):
OSTI ID: 1414606
Grant/Contract Number:  
SC0012670
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 111; Journal Issue: 25; Related Information: SHINES partners with University of California, Riverside (lead); Arizona State University; Colorado State University; Johns Hopkins University; University of California Irvine; University of California Los Angeles; University of Texas at Austin; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
phonons; thermal conductivity; thermoelectric; spin dynamics; spintronics

Citation Formats

Aytan, E., Debnath, B., Kargar, F., Barlas, Y., Lacerda, M. M., Li, J. X., Lake, R. K., Shi, J., and Balandin, A. A. Spin-phonon coupling in antiferromagnetic nickel oxide. United States: N. p., 2017. Web. doi:10.1063/1.5009598.
Aytan, E., Debnath, B., Kargar, F., Barlas, Y., Lacerda, M. M., Li, J. X., Lake, R. K., Shi, J., & Balandin, A. A. Spin-phonon coupling in antiferromagnetic nickel oxide. United States. doi:10.1063/1.5009598.
Aytan, E., Debnath, B., Kargar, F., Barlas, Y., Lacerda, M. M., Li, J. X., Lake, R. K., Shi, J., and Balandin, A. A. Fri . "Spin-phonon coupling in antiferromagnetic nickel oxide". United States. doi:10.1063/1.5009598. https://www.osti.gov/servlets/purl/1470129.
@article{osti_1470129,
title = {Spin-phonon coupling in antiferromagnetic nickel oxide},
author = {Aytan, E. and Debnath, B. and Kargar, F. and Barlas, Y. and Lacerda, M. M. and Li, J. X. and Lake, R. K. and Shi, J. and Balandin, A. A.},
abstractNote = {We report the results of ultraviolet Raman spectroscopy of NiO, which allowed us to determine the spin-phonon coupling coefficients in this important antiferromagnetic material. The use of the second-order phonon scattering and ultraviolet laser excitation (λ = 325 nm) was essential for overcoming the problem of the optical selection rules and dominance of the two-magnon band in the visible Raman spectrum of NiO. We established that the spins of Ni atoms interact more strongly with the longitudinal than transverse optical phonons and produce opposite effects on the phonon energies. The peculiarities of the spin-phonon coupling are consistent with the trends given by density functional theory. Lastly, the obtained results shed light on the nature of the spin-phonon coupling in antiferromagnetic insulators and can help in developing spintronic devices.},
doi = {10.1063/1.5009598},
journal = {Applied Physics Letters},
number = 25,
volume = 111,
place = {United States},
year = {2017},
month = {12}
}

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Cited by: 7 works
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