Electronic band structure study of colossal magnetoresistance in Tl2Mn2O7

D. K. Seo, M. H. Whangbo, M. A. Subramanian

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Abstract

The electronic structure of Tl2Mn2O7 was examined by performing tight binding band calculations. The overlap between the Mnt2g- and Tl 6s-block bands results in a partial filling of the Tl 6s-block bands. The associated Fermi surface consists of 12 cigar-shape electron pockets with each electron pocket about 1/1000 of the first Brillouin zone in size. The Tl 6s-block bands have orbital contributions from the Mn atoms, and the carrier density is very low. These are important for the occurrence of a colossal magnetoresistance in Tl2Mn2O7.

Original languageEnglish
Pages (from-to)417-421
Number of pages5
JournalSolid State Communications
Volume101
Issue number6
DOIs
Publication statusPublished - Feb 1997

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ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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