Pressure-induced phase transition and phonon softening in

K. A. Smith; S. P. Ramkumar; N. C. Harms; A. J. Clune; S. W. Cheong; Z. Liu; E. A. Nowadnick; J. L. Musfeldt

doi:10.1103/PhysRevB.104.094109

Pressure-induced phase transition and phonon softening in

K. A. Smith, S. P. Ramkumar, N. C. Harms, A. J. Clune, S. W. Cheong, Z. Liu, E. A. Nowadnick, J. L. Musfeldt

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

We combine diamond anvil cell techniques, synchrotron-based infrared and Raman scattering spectroscopies, a symmetry analysis, and complementary lattice dynamics calculations to explore the pressure-driven phase transition in multiferroic . Comparison of the measured and predicted phonon patterns reveals a structural transition at 15 GPa. Symmetry breaking across the polar antipolar transition takes place via changes in the bipyramidal tilting direction and Lu/Sc displacement pattern, analogous to the strain-driven distortion pathway in and temperature-induced transitions in the rare-earth manganites.

Original language	English (US)
Article number	094109
Journal	Physical Review B
Volume	104
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevB.104.094109
State	Published - Sep 1 2021
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.104.094109

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abstract = "We combine diamond anvil cell techniques, synchrotron-based infrared and Raman scattering spectroscopies, a symmetry analysis, and complementary lattice dynamics calculations to explore the pressure-driven phase transition in multiferroic . Comparison of the measured and predicted phonon patterns reveals a structural transition at 15 GPa. Symmetry breaking across the polar antipolar transition takes place via changes in the bipyramidal tilting direction and Lu/Sc displacement pattern, analogous to the strain-driven distortion pathway in and temperature-induced transitions in the rare-earth manganites.",

author = "Smith, {K. A.} and Ramkumar, {S. P.} and Harms, {N. C.} and Clune, {A. J.} and Cheong, {S. W.} and Z. Liu and Nowadnick, {E. A.} and Musfeldt, {J. L.}",

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AU - Smith, K. A.

AU - Ramkumar, S. P.

AU - Harms, N. C.

AU - Clune, A. J.

AU - Cheong, S. W.

AU - Liu, Z.

AU - Nowadnick, E. A.

AU - Musfeldt, J. L.

PY - 2021/9/1

Y1 - 2021/9/1

N2 - We combine diamond anvil cell techniques, synchrotron-based infrared and Raman scattering spectroscopies, a symmetry analysis, and complementary lattice dynamics calculations to explore the pressure-driven phase transition in multiferroic . Comparison of the measured and predicted phonon patterns reveals a structural transition at 15 GPa. Symmetry breaking across the polar antipolar transition takes place via changes in the bipyramidal tilting direction and Lu/Sc displacement pattern, analogous to the strain-driven distortion pathway in and temperature-induced transitions in the rare-earth manganites.

AB - We combine diamond anvil cell techniques, synchrotron-based infrared and Raman scattering spectroscopies, a symmetry analysis, and complementary lattice dynamics calculations to explore the pressure-driven phase transition in multiferroic . Comparison of the measured and predicted phonon patterns reveals a structural transition at 15 GPa. Symmetry breaking across the polar antipolar transition takes place via changes in the bipyramidal tilting direction and Lu/Sc displacement pattern, analogous to the strain-driven distortion pathway in and temperature-induced transitions in the rare-earth manganites.

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Pressure-induced phase transition and phonon softening in

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