论文信息 - On the enhancement of superconductivity due to Van Hove singularity

On the enhancement of superconductivity due to Van Hove singularity

We have rigorously solved the standard BCS gap equation with the density of states of Van Hove type. The result shows that the enhancement ofTc is not as effective as previously estimated. It seems unlikely that Van Hove singularity inN(E) can be theTc-enhancement mechanism for the high-Tc Cu oxides.

Xu Tiefeng | Bai Guiru | Xu Tiefeng | Bai Guiru

[1] J. Labbé,et al. Superconductivity in Alcaline-Earth-Substituted La2CuO4: A Theoretical Model , 1987 .

[2] J. Labbé,et al. Strong-Coupling Superconductivity in V3X type of Compounds , 1967 .

[3] H. Rietschel,et al. On the analysis of tunneling data for A15 superconductors , 1982 .

[4] J. Hirsch,et al. Enhanced superconductivity in quasi-two-dimensional systems. , 1986, Physical review letters.

[5] Chi,et al. Anomalous isotope effect and Van Hove singularity in superconducting Cu oxides. , 1990, Physical review letters.

[6] Ruvalds,et al. Nested-Fermi-liquid theory. , 1990, Physical review. B, Condensed matter.