Electronic structure and properties of quasi-two-dimensional layered superconducting perovskites

La2-xMxCuO4 (M=Ba,Sr,)

Arthur J Freeman, Jaejun Yu, C. L. Fu

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

Results of highly precise all-electron local-density calculations are presented for the quasi-two-dimensional superconductors La2-xMxCuOx (M=Ba,Sr,) with x=0 and correlated with a number of observed properties of these materials for varying x. The dominant role of the van Hove saddle-point singularity (SPS) on the density of states (DOS) and the DOS-derived properties (specific heat, magnetic susceptibility, Tc) is emphasizedas is the fact that this SPS represents the classic Lifshitz transition versus x (and/or pressure) with its possible thermodynamic and galvanomagnetic anomalies. Estimates of the enhancement factor from a variety of measured specific-heat values and our calculated DOS indicate that these materials may possibly be weak-coupling superconductors. Crude estimates of coherent lengths (and) and upper critical fields (Hc2 and Hc2) are presented.

Original languageEnglish
Pages (from-to)7111-7114
Number of pages4
JournalPhysical Review B
Volume36
Issue number13
DOIs
Publication statusPublished - 1987

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perovskites
Electronic properties
Superconducting materials
Specific heat
Electronic structure
electronic structure
saddle points
Magnetic susceptibility
specific heat
Thermodynamics
Electrons
estimates
trucks
anomalies
magnetic permeability
thermodynamics
augmentation
electrons

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Electronic structure and properties of quasi-two-dimensional layered superconducting perovskites : La2-xMxCuO4 (M=Ba,Sr,). / Freeman, Arthur J; Yu, Jaejun; Fu, C. L.

In: Physical Review B, Vol. 36, No. 13, 1987, p. 7111-7114.

Research output: Contribution to journalArticle

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