skip to main content

DOE PAGESDOE PAGES

This content will become publicly available on February 28, 2019

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

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:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 97; Journal Issue: 5; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1422995
Alternate Identifier(s):
OSTI ID: 1423161