Electronic structure of Fe3O4 across the verwey transition

A. Chainani, Takayoshi Yokoya, T. Morimoto, T. Takahashi, S. Todo

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

A study of the first-order Verwey transition in single-crystal Fe3O4 using high-resolution temperature dependent (100 - 300K) photoemission spectroscopy is reported. Fe3O4 exhibits a gap of ∼ 70 meV in the occupied part of the density of states(DOS) below the transition temperature, Tv = 122 K. On increasing the temperature above Tv, the gap in the DOS is closed thus establishing a metal-semiconductor transition. The Fe 3d derived features arising from Fe3+ (eg2) majority and Fe2+ (t2g 1) minority spin states responsible for the transition, retain their character just above the transition but merge into a single feature by 300 K. Simultaneously, the DOS at EF increases systematically in the metallic phase. The results indicate a gradual change in the short-range order for T > Tv which gives rise to the non-metallic like electrical conductivity observed just above Tv.

Original languageEnglish
Pages (from-to)99-102
Number of pages4
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume78
Publication statusPublished - May 1996
Externally publishedYes

Fingerprint

Electron transitions
Electronic structure
electronic structure
Photoelectron spectroscopy
Superconducting transition temperature
Metals
Single crystals
Semiconductor materials
Temperature
minorities
photoelectric emission
transition temperature
electrical resistivity
temperature
high resolution
single crystals
metals
spectroscopy
Electric Conductivity

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics
  • Surfaces and Interfaces

Cite this

Electronic structure of Fe3O4 across the verwey transition. / Chainani, A.; Yokoya, Takayoshi; Morimoto, T.; Takahashi, T.; Todo, S.

In: Journal of Electron Spectroscopy and Related Phenomena, Vol. 78, 05.1996, p. 99-102.

Research output: Contribution to journalArticle

Chainani, A. ; Yokoya, Takayoshi ; Morimoto, T. ; Takahashi, T. ; Todo, S. / Electronic structure of Fe3O4 across the verwey transition. In: Journal of Electron Spectroscopy and Related Phenomena. 1996 ; Vol. 78. pp. 99-102.
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