Pairing symmetry and vortex lattice of high temperature superconductors

被引：0

作者：

Zhou, Shi-Ping ^{[1
]}

Qu, Hai ^{[1
]}

Liao, Hong-Yin ^{[1
]}

机构：

[1] Department of Physics, Shanghai University, Shanghai 201800, China

来源：

Wuli Xuebao/Acta Physica Sinica | 2002年 / 51卷 / 10期

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摘要：

We studied pairing symmetry of YBa2Cu3O7-8 high-temperature superconductor using a generic Ginzburg-Landau model. The phase transition between the mixed s-dx2-y2 state and dx2-y2 wave was shown. The vortex lattice of a YBa2 Cu3 O7 superconductor is oblique at the temperature well below the transition temperature Tc, where the mixed s-dx2-y2 state is expected to have the lowest energy. Whereas, very close to Tc, the dx2-y2 wave is slightly lower in energy, and a triangular vortex lattice recovers. The coexistence and the coupling between the s-and d-waves would account for the unusual behaviours such as the upward curvature of the upper critical field curve Hc2 (T).

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