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Title: Phonon coupling to dynamic short-range polar order in a relaxor ferroelectric near the morphotropic phase boundary

Abstract

We report neutron inelastic scattering experiments on single-crystal PbMg1/3Nb2/3O3 doped with 32% PbTiO3, a relaxor ferroelectric that lies close to the morphotropic phase boundary. When cooled under an electric field E∥ [001] into tetragonal and monoclinic phases, the scattering cross section from transverse acoustic (TA) phonons polarized parallel to E weakens and shifts to higher energy relative to that under zero-field-cooled conditions. Likewise, the scattering cross section from transverse optic (TO) phonons polarized parallel to E weakens for energy transfers 4≤ω≤9 meV. However, TA and TO phonons polarized perpendicular to E show no change. This anisotropic field response is similar to that of the diffuse scattering cross section, which, as previously reported, is suppressed when polarized parallel to E but not when polarized perpendicular to E. Our findings suggest that the lattice dynamics and dynamic short-range polar correlations that give rise to the diffuse scattering are coupled.

Authors:
 [1];  [2]; ORCiD logo [3];  [4];  [5];  [2];  [6]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.; Stony Brook Univ., Stony Brook, NY (United States). Dept. of Physics and Astronomy
  2. Univ. of California, Berkeley, CA (United States). Physics Dept.; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Science Division
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division
  4. Univ. of Edinburgh, Edinburgh (United Kingdom). School of Physics and Astronomy
  5. National Institute of Standards and Technology, Gaithersburg, MD (United States). NIST Center for Neutron Research
  6. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
OSTI Identifier:
1240704
Alternate Identifier(s):
OSTI ID: 1234018; OSTI ID: 1393881; OSTI ID: 1456920
Report Number(s):
BNL-111868-2016-JA
Journal ID: ISSN 1098-0121; PRBMDO; R&D Project: PO010; KC0201060
Grant/Contract Number:  
SC00112704; AC02-05CH11231; AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 92; Journal Issue: 21; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Schneeloch, John A., Xu, Zhijun, Winn, B., Stock, C., Gehring, P. M., Birgeneau, R. J., and Xu, Guangyong. Phonon coupling to dynamic short-range polar order in a relaxor ferroelectric near the morphotropic phase boundary. United States: N. p., 2015. Web. doi:10.1103/PhysRevB.92.214302.
Schneeloch, John A., Xu, Zhijun, Winn, B., Stock, C., Gehring, P. M., Birgeneau, R. J., & Xu, Guangyong. Phonon coupling to dynamic short-range polar order in a relaxor ferroelectric near the morphotropic phase boundary. United States. https://doi.org/10.1103/PhysRevB.92.214302
Schneeloch, John A., Xu, Zhijun, Winn, B., Stock, C., Gehring, P. M., Birgeneau, R. J., and Xu, Guangyong. 2015. "Phonon coupling to dynamic short-range polar order in a relaxor ferroelectric near the morphotropic phase boundary". United States. https://doi.org/10.1103/PhysRevB.92.214302. https://www.osti.gov/servlets/purl/1240704.
@article{osti_1240704,
title = {Phonon coupling to dynamic short-range polar order in a relaxor ferroelectric near the morphotropic phase boundary},
author = {Schneeloch, John A. and Xu, Zhijun and Winn, B. and Stock, C. and Gehring, P. M. and Birgeneau, R. J. and Xu, Guangyong},
abstractNote = {We report neutron inelastic scattering experiments on single-crystal PbMg1/3Nb2/3O3 doped with 32% PbTiO3, a relaxor ferroelectric that lies close to the morphotropic phase boundary. When cooled under an electric field E∥ [001] into tetragonal and monoclinic phases, the scattering cross section from transverse acoustic (TA) phonons polarized parallel to E weakens and shifts to higher energy relative to that under zero-field-cooled conditions. Likewise, the scattering cross section from transverse optic (TO) phonons polarized parallel to E weakens for energy transfers 4≤ω≤9 meV. However, TA and TO phonons polarized perpendicular to E show no change. This anisotropic field response is similar to that of the diffuse scattering cross section, which, as previously reported, is suppressed when polarized parallel to E but not when polarized perpendicular to E. Our findings suggest that the lattice dynamics and dynamic short-range polar correlations that give rise to the diffuse scattering are coupled.},
doi = {10.1103/PhysRevB.92.214302},
url = {https://www.osti.gov/biblio/1240704}, journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 21,
volume = 92,
place = {United States},
year = {Mon Dec 28 00:00:00 EST 2015},
month = {Mon Dec 28 00:00:00 EST 2015}
}

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Cited by: 3 works
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Works referencing / citing this record:

Spontaneous decay of a soft optical phonon in the relaxor ferroelectric PbMg 1 / 3 Nb 2 / 3 O 3
journal, February 2018