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首页> 外文期刊>Journal of Superconductivity >Superconductivity and phase diagram in a CuO{sub}2 monolayer
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Superconductivity and phase diagram in a CuO{sub}2 monolayer

机译:CuO{sub}2单层中的超导性和相图

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摘要

We recall the van Hove scenario (J. Labbe and J. Bok, Europhys. Lett. 3, 1225 (1987); J. Bouvier and J. Bok, in The Gap Symmetry and Fluctuations in HTSC, J. Bok et al., eds. (Plenum, New York, 1998)) developed since 1987. It explains high T{sub}c, anomalous isotope effect, gap anisotropy etc. We apply this scenario to the superconductive surface layer, obtained by field effect on CaCuO{sub}2 by J. H. Schon et al. Preprint (private communication), to be published). We show that the variation of resistivity and Hall effect with temperature in the normal state can be understood by the presence of a van Hove singularity (v.H.s.) in the band structure. The doping by field effect changes the distance between the Fermi level and the v.H.s.
机译:我们回顾了自1987年以来开发的van Hove情景(J. Labbe and J. Bok, Europhys. Lett. 3, 1225 (1987); J. Bouvier and J. Bok, in The Gap Symmetry and Fluctuations in HTSC, J. Bok et al., eds. (Plenum, New York, 1998))它解释了高T{sub}c,异常同位素效应,间隙各向异性等。我们将这种情况应用于超导表面层,由 J. H. Schon 等人通过对 CaCuO{sub}2 的场效应获得。预印本(私人通信),待发布)。我们表明,在正常状态下,电阻率和霍尔效应随温度的变化可以通过能带结构中范霍夫奇点(v.H.s.)的存在来理解。场效应掺杂改变了费米能级和v.H.s之间的距离。

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