Strongly correlated electron materials. II. Band structure and renormalized density of states in heavy-fermion systems and high-[ital T][sub [ital c]] superconductors

Journal Article · Thu Jul 01 00:00:00 EDT 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.48.1139· OSTI ID:6367018

Costa-Quintana, J; Lopez-Aguilar, F; Puig-Puig, L ^[1]

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1. Departament de Fisica, Grup d'Electromagnetisme, Universidad Autonoma de Barcelona, Bellaterra, E-08193 Barcelona (Spain)

We give a method for obtaining renormalized electronic structures arising from quasiparticle band structures of actual Hubbard systems, using some of the self-energies deduced in paper I of this series. The quasiparticle band structures are determined from an appropriate modification of the augmented plane-wave method, and the renormalized density of states is found from the spectral functions. We calculate the quasiparticle structure of a Ce system, which presents the three characteristic types of resonances of the pseudogap regime mentioned in paper I of this series and also the electronic structure of Y-Ba-Cu-O, which seems to display the characteristics of a standard Fermi liquid or a marginal Fermi liquid.

• OSTI ID: 6367018
• Journal Information: Physical Review, B: Condensed Matter; (United States), Vol. 48:2; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HIGH-TC SUPERCONDUCTORS
ELECTRONIC STRUCTURE
HUBBARD MODEL
ELECTRON CORRELATION
ENERGY-LEVEL DENSITY
QUASI PARTICLES
RENORMALIZATION
SPECTRAL FUNCTIONS
STRONG-COUPLING MODEL
CORRELATIONS
CRYSTAL MODELS
FUNCTIONS
MATHEMATICAL MODELS
PARTICLE MODELS
SUPERCONDUCTORS
665411* - Basic Superconductivity Studies- (1992-)