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arXiv 1208.2190cond-mat.supr-con
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Rashba型自旋轨道耦合下推广的哈伯德模型的超导配对对称性

Superconducting pairing symmetry on the extended Hubbard model in the presence of the Rashba-type spin-orbit coupling

K. Shigeta, S. Onari, Y. Tanaka

摘要:

为了研究非中心对称超导体中的对对称性,在无规相近似下,考虑Rashba型自旋轨道耦合(RSOC),求解了二维扩展哈伯德模型上的线性化Eliashberg方程.在RSOC的存在下,三种类型的配对对称性出现在相图相对于在现场库仑排斥U和离现场一个V。每一个配对对称性的混合物的自旋单重态和三重态的。在分析研究的基础上,发现自旋单重态和自旋三重态的混合不仅取决于主要的对对称性,而且还取决于色散关系和对相互作用。

英文摘要:

In order to study the pairing symmetry in non-centrosymmetric superconductors, we solve the linearized Eliashberg's equation on the two-dimensional extended Hubbard model in the presence of the Rashba-type spin-orbit coupling (RSOC) within the random phase approximation. In the presence of the RSOC, three types of pairing symmetries appear in the phase diagram with respect to the on-site Coulomb repulsion U and off-site one V. Each of pairing symmetries is admixture of spin-singlet and -triplet ones. On the basis of analytical study, it is found that the admixture of spin-singlet and -triplet components depends on not only the predominant pairing symmetry but also dispersion relation and pairing interaction.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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