Electronic structure and properties of YBa2Cu3O7-δ, a low dimensional, low density of states superconductor

S. Massidda, Jaejun Yu, Arthur J Freeman, D. D. Koelling

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Abstract

The electronic structure of the high Tc superconductor, YBa2Cu3O7-δ, determined from highly precise all-electron local density calculations yields a relatively simple highly 2D electronic band structure consisting of two 2D Cu2-O and two 1D Cu1-O bands (one almost empty and one almost full at δ=0, becoming full at δ≥0.1) near EF. Detailed features (multi-peaks) of the density of states (DOS) are correlated with the band structure of the 36 Cu-O band complex. Surprising features include: (i) the low DOS at EF, especially for δ≥0.1 which is much longer than that in La2-xSrxCuO4 - in agreement with experiment - and (ii) a relatively large magnetic Stoner factor.

Original languageEnglish
Pages (from-to)198-202
Number of pages5
JournalPhysics Letters A
Volume122
Issue number3-4
DOIs
Publication statusPublished - Jun 8 1987

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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