Simple lattice model for d-type gap anisotropy for layered cuprates
Journal Article
·
· Journal of Low Temperature Physics
- Univ. of Sofia (Burma)
Double electron exchange between Cu4s and O2p{sub {sigma}} orbitals is analyzed as mechanism which creates traditional cooper pairing in layered cuprates. The conductivity band is obtained in the oversimplified model which considers only hopping between O2p{sub {sigma}} orbitals, and the amplitude of the Cu4s - O2p{sub {sigma}} hybridization is accounted as perturbation. The proposed toy model possesses most of the distinguishable features of the experimental data: angle dependence of the superconducting gap, the shape of the Fermi surface, dispersion law for conductivity band and the electron spectrum of the superconducting phase. The influence of the Cu3d{sub x{sup 2}{minus}y{sup 2}} orbital, election doping and disorder for transition to s-type superconducting gap is briefly discussed.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 535100
- Journal Information:
- Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 5-6 Vol. 107; ISSN JLTPAC; ISSN 0022-2291
- Country of Publication:
- United States
- Language:
- English
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