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Title: Response to comment on “Giant electromechanical coupling of relaxor ferroelectrics controlled by polar nanoregion vibrations”

Abstract

Gehring et al. argue that a splitting observed by us in the transverse acoustic (TA) phonon in the relaxor ferroelectric Pb[(Mg 1/3Nb 2/3) 1-xTi x]O 3 with x= 0.30 (PMN-30PT) is caused by a combination of inelastic-elastic multiple scattering processes called ghostons. Their argument is motivated by differences observed between their measurements made on a triple-axis spectrometer and our measurements on a time-of-flight spectrometer. We show that the differences can be explained by differences in the instrument resolution functions. We demonstrate that the multiple scattering conditions proposed by Gehring et al. do not work for our scattering geometry. We also demonstrate that, when a ghoston is present, it is too weak to detect and therefore cannot explain the splitting. Finally, this phonon splitting is just one part of the argument, and the overall conclusion of the original paper is supported by other results.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]
  1. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
  2. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
OSTI Identifier:
1503990
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Science Advances
Additional Journal Information:
Journal Volume: 5; Journal Issue: 3; Journal ID: ISSN 2375-2548
Publisher:
AAAS
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Manley, M. E., Abernathy, D. L., Christianson, A. D., and Lynn, J. W. Response to comment on “Giant electromechanical coupling of relaxor ferroelectrics controlled by polar nanoregion vibrations”. United States: N. p., 2019. Web. doi:10.1126/sciadv.aaw4367.
Manley, M. E., Abernathy, D. L., Christianson, A. D., & Lynn, J. W. Response to comment on “Giant electromechanical coupling of relaxor ferroelectrics controlled by polar nanoregion vibrations”. United States. doi:10.1126/sciadv.aaw4367.
Manley, M. E., Abernathy, D. L., Christianson, A. D., and Lynn, J. W. Fri . "Response to comment on “Giant electromechanical coupling of relaxor ferroelectrics controlled by polar nanoregion vibrations”". United States. doi:10.1126/sciadv.aaw4367. https://www.osti.gov/servlets/purl/1503990.
@article{osti_1503990,
title = {Response to comment on “Giant electromechanical coupling of relaxor ferroelectrics controlled by polar nanoregion vibrations”},
author = {Manley, M. E. and Abernathy, D. L. and Christianson, A. D. and Lynn, J. W.},
abstractNote = {Gehring et al. argue that a splitting observed by us in the transverse acoustic (TA) phonon in the relaxor ferroelectric Pb[(Mg1/3Nb2/3)1-xTix]O3 with x= 0.30 (PMN-30PT) is caused by a combination of inelastic-elastic multiple scattering processes called ghostons. Their argument is motivated by differences observed between their measurements made on a triple-axis spectrometer and our measurements on a time-of-flight spectrometer. We show that the differences can be explained by differences in the instrument resolution functions. We demonstrate that the multiple scattering conditions proposed by Gehring et al. do not work for our scattering geometry. We also demonstrate that, when a ghoston is present, it is too weak to detect and therefore cannot explain the splitting. Finally, this phonon splitting is just one part of the argument, and the overall conclusion of the original paper is supported by other results.},
doi = {10.1126/sciadv.aaw4367},
journal = {Science Advances},
number = 3,
volume = 5,
place = {United States},
year = {2019},
month = {3}
}

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