Electronic and magnetic properties of metallic phases under coexisting short-range interaction and diagonal disorder

Hiroshi Shinaoka, Masatoshi Imada

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We study a three-dimensional Anderson-Hubbard model under the coexistence of short-range interaction and diagonal disorder within the Hartree-Fock approximation. We show that the density of states at the Fermi energy is suppressed in the metallic phases near the metal-insulator transition as a proximity effect of the soft Hubbard gap in the insulating phases. The transition to the insulator is characterized by a vanishing density of states (DOS) in contrast to the formation of a quasiparticle peak at the Fermi energy obtained using the dynamical mean field theory in pure systems. Furthermore, we show that there exist frozen spin moments in the paramagnetic metal.

Original languageEnglish
Article number094711
JournalJournal of the Physical Society of Japan
Volume79
Issue number9
DOIs
Publication statusPublished - 2010 Sep 1
Externally publishedYes

Fingerprint

insulators
disorders
magnetic properties
Hartree approximation
electronics
metals
interactions
moments
energy

Keywords

  • Anderson localization
  • Anderson-Hubbard model
  • Disorder
  • Electron correlation
  • Mott transition
  • Pseudogap
  • Randomness
  • Single-particle density of states
  • Soft Hubbard gap
  • Spin glass

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

@article{441cc38cfc38402d91b5e697e05ca8f8,
title = "Electronic and magnetic properties of metallic phases under coexisting short-range interaction and diagonal disorder",
abstract = "We study a three-dimensional Anderson-Hubbard model under the coexistence of short-range interaction and diagonal disorder within the Hartree-Fock approximation. We show that the density of states at the Fermi energy is suppressed in the metallic phases near the metal-insulator transition as a proximity effect of the soft Hubbard gap in the insulating phases. The transition to the insulator is characterized by a vanishing density of states (DOS) in contrast to the formation of a quasiparticle peak at the Fermi energy obtained using the dynamical mean field theory in pure systems. Furthermore, we show that there exist frozen spin moments in the paramagnetic metal.",
keywords = "Anderson localization, Anderson-Hubbard model, Disorder, Electron correlation, Mott transition, Pseudogap, Randomness, Single-particle density of states, Soft Hubbard gap, Spin glass",
author = "Hiroshi Shinaoka and Masatoshi Imada",
year = "2010",
month = "9",
day = "1",
doi = "10.1143/JPSJ.79.094711",
language = "English",
volume = "79",
journal = "Journal of the Physical Society of Japan",
issn = "0031-9015",
publisher = "Physical Society of Japan",
number = "9",

}

TY - JOUR

T1 - Electronic and magnetic properties of metallic phases under coexisting short-range interaction and diagonal disorder

AU - Shinaoka, Hiroshi

AU - Imada, Masatoshi

PY - 2010/9/1

Y1 - 2010/9/1

N2 - We study a three-dimensional Anderson-Hubbard model under the coexistence of short-range interaction and diagonal disorder within the Hartree-Fock approximation. We show that the density of states at the Fermi energy is suppressed in the metallic phases near the metal-insulator transition as a proximity effect of the soft Hubbard gap in the insulating phases. The transition to the insulator is characterized by a vanishing density of states (DOS) in contrast to the formation of a quasiparticle peak at the Fermi energy obtained using the dynamical mean field theory in pure systems. Furthermore, we show that there exist frozen spin moments in the paramagnetic metal.

AB - We study a three-dimensional Anderson-Hubbard model under the coexistence of short-range interaction and diagonal disorder within the Hartree-Fock approximation. We show that the density of states at the Fermi energy is suppressed in the metallic phases near the metal-insulator transition as a proximity effect of the soft Hubbard gap in the insulating phases. The transition to the insulator is characterized by a vanishing density of states (DOS) in contrast to the formation of a quasiparticle peak at the Fermi energy obtained using the dynamical mean field theory in pure systems. Furthermore, we show that there exist frozen spin moments in the paramagnetic metal.

KW - Anderson localization

KW - Anderson-Hubbard model

KW - Disorder

KW - Electron correlation

KW - Mott transition

KW - Pseudogap

KW - Randomness

KW - Single-particle density of states

KW - Soft Hubbard gap

KW - Spin glass

UR - http://www.scopus.com/inward/record.url?scp=77957039137&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77957039137&partnerID=8YFLogxK

U2 - 10.1143/JPSJ.79.094711

DO - 10.1143/JPSJ.79.094711

M3 - Article

VL - 79

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

SN - 0031-9015

IS - 9

M1 - 094711

ER -