Phonon modes and local polar distortions in nanoclusters of Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 crystals probed by terahertz reflectance spectra and Raman scattering

J. J. Zhu; J. Z. Zhang; G. S. Xu; X. L. Zhang; Z. G. Hu; J. H. Chu

doi:10.1088/1612-2011/12/5/056103

Phonon modes and local polar distortions in nanoclusters of Pb(In_1/2Nb_1/2)O₃-Pb(Mg_1/3Nb₂/3)O₃-PbTiO₃ crystals probed by terahertz reflectance spectra and Raman scattering

J. J. Zhu
, J. Z. Zhang
, G. S. Xu
, X. L. Zhang
, Z. G. Hu
, J. H. Chu

School of Physics and Electronic Science

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

1 Scopus citations

Abstract

Optic phonons and lattice vibrations of Pb(In_1/2Nb_1/2)O₃-Pb(Mg_1/3Nb₂/3)O₃-PbTiO₃ single crystals near the morphotropic phase boundary (MPB) are determined by terahertz (THz) reflectance spectra in a temperature range of 5.5-300 K. Raman scattering is measured with a He-Ne laser with a wavelength of 632.8 nm as the exciting source. On cooling from 300 K, the A1 component of the splitting TO1 mode hardens, which follows the Cochran law with a critical softening temperature of 761-861 K. Moreover, the E component of the soft mode is heavily damped around 0.81 THz (27 cm^{- 1}). Additional polar phonon modes, which are forbidden in the cubic structure, are activated due to the broken cubic symmetry in polar clusters.

Original language	English
Article number	056103
Journal	Laser Physics Letters
Volume	12
Issue number	5
DOIs	https://doi.org/10.1088/1612-2011/12/5/056103
State	Published - 1 May 2015

Keywords

Ferroelectric
Raman scattering
crystal
morphotropic phase boundary
soft mode
terahertz reflectance spectra

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@article{cbf0ee4f91f94d6cb6b667cb271f4cf4,

title = "Phonon modes and local polar distortions in nanoclusters of Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 crystals probed by terahertz reflectance spectra and Raman scattering",

abstract = "Optic phonons and lattice vibrations of Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 single crystals near the morphotropic phase boundary (MPB) are determined by terahertz (THz) reflectance spectra in a temperature range of 5.5-300 K. Raman scattering is measured with a He-Ne laser with a wavelength of 632.8 nm as the exciting source. On cooling from 300 K, the A1 component of the splitting TO1 mode hardens, which follows the Cochran law with a critical softening temperature of 761-861 K. Moreover, the E component of the soft mode is heavily damped around 0.81 THz (27 cm- 1). Additional polar phonon modes, which are forbidden in the cubic structure, are activated due to the broken cubic symmetry in polar clusters.",

keywords = "Ferroelectric, Raman scattering, crystal, morphotropic phase boundary, soft mode, terahertz reflectance spectra",

author = "Zhu, \{J. J.\} and Zhang, \{J. Z.\} and Xu, \{G. S.\} and Zhang, \{X. L.\} and Hu, \{Z. G.\} and Chu, \{J. H.\}",

note = "Publisher Copyright: {\textcopyright} 2015 Astro Ltd.",

year = "2015",

month = may,

day = "1",

doi = "10.1088/1612-2011/12/5/056103",

language = "英语",

volume = "12",

journal = "Laser Physics Letters",

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TY - JOUR

T1 - Phonon modes and local polar distortions in nanoclusters of Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 crystals probed by terahertz reflectance spectra and Raman scattering

AU - Zhu, J. J.

AU - Zhang, J. Z.

AU - Xu, G. S.

AU - Zhang, X. L.

AU - Hu, Z. G.

AU - Chu, J. H.

PY - 2015/5/1

Y1 - 2015/5/1

N2 - Optic phonons and lattice vibrations of Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 single crystals near the morphotropic phase boundary (MPB) are determined by terahertz (THz) reflectance spectra in a temperature range of 5.5-300 K. Raman scattering is measured with a He-Ne laser with a wavelength of 632.8 nm as the exciting source. On cooling from 300 K, the A1 component of the splitting TO1 mode hardens, which follows the Cochran law with a critical softening temperature of 761-861 K. Moreover, the E component of the soft mode is heavily damped around 0.81 THz (27 cm- 1). Additional polar phonon modes, which are forbidden in the cubic structure, are activated due to the broken cubic symmetry in polar clusters.

AB - Optic phonons and lattice vibrations of Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 single crystals near the morphotropic phase boundary (MPB) are determined by terahertz (THz) reflectance spectra in a temperature range of 5.5-300 K. Raman scattering is measured with a He-Ne laser with a wavelength of 632.8 nm as the exciting source. On cooling from 300 K, the A1 component of the splitting TO1 mode hardens, which follows the Cochran law with a critical softening temperature of 761-861 K. Moreover, the E component of the soft mode is heavily damped around 0.81 THz (27 cm- 1). Additional polar phonon modes, which are forbidden in the cubic structure, are activated due to the broken cubic symmetry in polar clusters.

KW - Ferroelectric

KW - Raman scattering

KW - crystal

KW - morphotropic phase boundary

KW - soft mode

KW - terahertz reflectance spectra

UR - https://www.scopus.com/pages/publications/84928975078

U2 - 10.1088/1612-2011/12/5/056103

DO - 10.1088/1612-2011/12/5/056103

M3 - 文章

AN - SCOPUS:84928975078

SN - 1612-2011

VL - 12

JO - Laser Physics Letters

JF - Laser Physics Letters

IS - 5

M1 - 056103

ER -

Phonon modes and local polar distortions in nanoclusters of Pb(In_1/2Nb_1/2)O₃-Pb(Mg_1/3Nb₂/3)O₃-PbTiO₃ crystals probed by terahertz reflectance spectra and Raman scattering

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