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Title: Observation of soft phonon mode in TbFe 3 ( BO 3 ) 4 by inelastic neutron scattering

Abstract

In this study, the phonon dispersion in terbium iron borate TbFe 3(BO 3) 4 has been measured by inelastic neutron scattering in a temperature range 180S=192.5 K and studied by ab initio calculations. Significant, but not complete, softening of the transverse acoustic (TA) branch has been observed at the corner of the Brillouin zone (Λ point) at temperatures T≳T S, in full agreement with theoretical calculations. Finally, the TA soft mode undergoes considerable broadening at the Λ point near the transition temperature that can be attributed to the anharmonic interference between transverse acoustic and optical modes.

Authors:
 [1];  [1]; ORCiD logo [2]; ORCiD logo [3];  [1];  [1];  [1]; ORCiD logo [2]
  1. Federal Research Center, Krasnoyarsk (Russia). Kirensky Institute of Physics
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Scattering Division
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Technologies Division
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1422995
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review B; Journal Volume: 97; Journal Issue: 5
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Pavlovskiy, M. S., Shaykhutdinov, Krill A., Wu, L. S., Ehlers, G., Temerov, V. L., Gudim, I. A., Shinkorenko, A. S., and Podlesnyak, Andrey A. Observation of soft phonon mode in TbFe3(BO3)4 by inelastic neutron scattering. United States: N. p., 2018. Web. doi:10.1103/PhysRevB.97.054313.
Pavlovskiy, M. S., Shaykhutdinov, Krill A., Wu, L. S., Ehlers, G., Temerov, V. L., Gudim, I. A., Shinkorenko, A. S., & Podlesnyak, Andrey A. Observation of soft phonon mode in TbFe3(BO3)4 by inelastic neutron scattering. United States. doi:10.1103/PhysRevB.97.054313.
Pavlovskiy, M. S., Shaykhutdinov, Krill A., Wu, L. S., Ehlers, G., Temerov, V. L., Gudim, I. A., Shinkorenko, A. S., and Podlesnyak, Andrey A. Wed . "Observation of soft phonon mode in TbFe3(BO3)4 by inelastic neutron scattering". United States. doi:10.1103/PhysRevB.97.054313.
@article{osti_1422995,
title = {Observation of soft phonon mode in TbFe3(BO3)4 by inelastic neutron scattering},
author = {Pavlovskiy, M. S. and Shaykhutdinov, Krill A. and Wu, L. S. and Ehlers, G. and Temerov, V. L. and Gudim, I. A. and Shinkorenko, A. S. and Podlesnyak, Andrey A.},
abstractNote = {In this study, the phonon dispersion in terbium iron borate TbFe3(BO3)4 has been measured by inelastic neutron scattering in a temperature range 180S=192.5 K and studied by ab initio calculations. Significant, but not complete, softening of the transverse acoustic (TA) branch has been observed at the corner of the Brillouin zone (Λ point) at temperatures T≳TS, in full agreement with theoretical calculations. Finally, the TA soft mode undergoes considerable broadening at the Λ point near the transition temperature that can be attributed to the anharmonic interference between transverse acoustic and optical modes.},
doi = {10.1103/PhysRevB.97.054313},
journal = {Physical Review B},
number = 5,
volume = 97,
place = {United States},
year = {Wed Feb 28 00:00:00 EST 2018},
month = {Wed Feb 28 00:00:00 EST 2018}
}