Finite-temperature conductivity in the planar [ital t]-[ital J] model

Journal Article · Thu Sep 01 04:00:00 EDT 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.50.7129· OSTI ID:6669484

Jaklic, J; Prelovsek, P ^[1]

---

1. J. Stefan Institute, University of Ljubljana, 61111 Ljubljana (Slovenia)

Results are for finite-temperature optical conductivity [sigma]([omega]) and dc resistivity [rho]([ital T]), obtained within the [ital t]-[ital J] model on a square lattice by a method based on the Lanczos diagonalization. Studying systems with [ital N]=16 or 18 sites and hole concentrations [ital c][sub [ital h]][le]0.25, a thermodynamic behavior is reached for quite low temperatures. [sigma]([omega]) spectra reveal a slow non-Drude falloff at large frequencies and the emergence of a broad midinfrared peak at low doping. At optimum doping [rho]([ital T]) shows nearly linear variation with [ital T]. Both quantities agree well with experimental results in cuprates.

• OSTI ID: 6669484
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 50:10; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
COPPER COMPOUNDS
CORRELATIONS
CUPRATES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON CORRELATION
HIGH-TC SUPERCONDUCTORS
HOLES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
TRANSPORT THEORY