Probable realization of rotor systems in SrTiO3and PbZr1-xTixO3

Hai Yao Deng; Haitao Huang; Chi Hang Lam

doi:10.1016/j.physb.2013.04.027

Probable realization of rotor systems in SrTiO₃and PbZr_1-xTi_xO₃

Hai Yao Deng, Haitao Huang, Chi Hang Lam

Research output: Journal article publication › Journal article › Academic research › peer-review

Abstract

Rotor descriptions of some perovskite compounds and alloys are possibly shown. Temperature behavior of a quantity (T1) in SrTiO3are discussed. T1is argued to serve as fingerprints in identifying the nature of a local mode. It is found with a dip around 105 K, which defies usual wisdom but proves explicable by both the eight-corner and the rotor model. A mapping may exist between these models. We then model PbZr1-xTixO3as a lattice of rotors with randomly distributed cubic anisotropy. The x-driven transition is argued to be of percolation type. Consequences are discussed and shown agreeing with observations.

Original language	English
Pages (from-to)	83-86
Number of pages	4
Journal	Physica B: Condensed Matter
Volume	421
DOIs	https://doi.org/10.1016/j.physb.2013.04.027
Publication status	Published - 15 Jul 2013

Keywords

Dielectric constant
Incipient ferroelectrics
Quantum rotor model

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

More information

10.1016/j.physb.2013.04.027

Cite this

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title = "Probable realization of rotor systems in SrTiO3and PbZr1-xTixO3",

abstract = "Rotor descriptions of some perovskite compounds and alloys are possibly shown. Temperature behavior of a quantity (T1) in SrTiO3are discussed. T1is argued to serve as fingerprints in identifying the nature of a local mode. It is found with a dip around 105 K, which defies usual wisdom but proves explicable by both the eight-corner and the rotor model. A mapping may exist between these models. We then model PbZr1-xTixO3as a lattice of rotors with randomly distributed cubic anisotropy. The x-driven transition is argued to be of percolation type. Consequences are discussed and shown agreeing with observations.",

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AU - Deng, Hai Yao

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