Metal-insulator transition in Mn perovskite compounds

Yukitoshi Motome; Hiroki Nakano; Masatoshi Imada

doi:10.1016/S0921-5107(99)00052-5

Metal-insulator transition in Mn perovskite compounds

Yukitoshi Motome, Hiroki Nakano, Masatoshi Imada

Research output: Contribution to journal › Conference article › peer-review

1 Citation (Scopus)

Abstract

We discuss Mott insulating and metallic phases of a model with e_g orbital degeneracy with regard to understanding the physics of Mn perovskite compounds. Quantum Monte Carlo (QMC) and Lanczos diagonalization (LD) results are discussed in this model. To reproduce experimental results on charge gap and Jahn-Teller distortions, we show that a synergy between the strong correlation effects and the Jahn-Teller coupling is important. The incoherent charge dynamics and strong charge fluctuations are characteristic of the metallic phase accompanied with critical enhancement of short-ranged orbital correlation near the insulator.

Original language	English
Pages (from-to)	58-64
Number of pages	7
Journal	Materials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume	63
Issue number	1
DOIs	https://doi.org/10.1016/S0921-5107(99)00052-5
Publication status	Published - 1999 Aug 16
Externally published	Yes
Event	Proceedings of the 1998 7th NEC Symposium on Fundamental Approaches to New Material Phases: Phase Control in Spin-Charge-Orbital Complex Systems - Nasu, Jpn Duration: 1998 Oct 11 → 1998 Oct 15

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Metal-insulator transition in Mn perovskite compounds",

abstract = "We discuss Mott insulating and metallic phases of a model with eg orbital degeneracy with regard to understanding the physics of Mn perovskite compounds. Quantum Monte Carlo (QMC) and Lanczos diagonalization (LD) results are discussed in this model. To reproduce experimental results on charge gap and Jahn-Teller distortions, we show that a synergy between the strong correlation effects and the Jahn-Teller coupling is important. The incoherent charge dynamics and strong charge fluctuations are characteristic of the metallic phase accompanied with critical enhancement of short-ranged orbital correlation near the insulator.",

author = "Yukitoshi Motome and Hiroki Nakano and Masatoshi Imada",

note = "Copyright: Copyright 2017 Elsevier B.V., All rights reserved.; Proceedings of the 1998 7th NEC Symposium on Fundamental Approaches to New Material Phases: Phase Control in Spin-Charge-Orbital Complex Systems ; Conference date: 11-10-1998 Through 15-10-1998",

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T1 - Metal-insulator transition in Mn perovskite compounds

AU - Motome, Yukitoshi

AU - Nakano, Hiroki

AU - Imada, Masatoshi

PY - 1999/8/16

Y1 - 1999/8/16

N2 - We discuss Mott insulating and metallic phases of a model with eg orbital degeneracy with regard to understanding the physics of Mn perovskite compounds. Quantum Monte Carlo (QMC) and Lanczos diagonalization (LD) results are discussed in this model. To reproduce experimental results on charge gap and Jahn-Teller distortions, we show that a synergy between the strong correlation effects and the Jahn-Teller coupling is important. The incoherent charge dynamics and strong charge fluctuations are characteristic of the metallic phase accompanied with critical enhancement of short-ranged orbital correlation near the insulator.

AB - We discuss Mott insulating and metallic phases of a model with eg orbital degeneracy with regard to understanding the physics of Mn perovskite compounds. Quantum Monte Carlo (QMC) and Lanczos diagonalization (LD) results are discussed in this model. To reproduce experimental results on charge gap and Jahn-Teller distortions, we show that a synergy between the strong correlation effects and the Jahn-Teller coupling is important. The incoherent charge dynamics and strong charge fluctuations are characteristic of the metallic phase accompanied with critical enhancement of short-ranged orbital correlation near the insulator.

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DO - 10.1016/S0921-5107(99)00052-5

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SN - 0921-5107

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SP - 58

EP - 64

JO - Materials Science and Engineering B: Solid-State Materials for Advanced Technology

JF - Materials Science and Engineering B: Solid-State Materials for Advanced Technology

IS - 1

T2 - Proceedings of the 1998 7th NEC Symposium on Fundamental Approaches to New Material Phases: Phase Control in Spin-Charge-Orbital Complex Systems

Y2 - 11 October 1998 through 15 October 1998

ER -

Metal-insulator transition in Mn perovskite compounds

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