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arXiv 0905.2296cond-mat.mes-hallcond-mat.supr-conhep-th
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超导电流在Z_2拓扑绝缘体中的(去)禁闭

(De)confinement of supercurrent in Z_2 Topological Insulators

Jun Goryo, Nobuki Maeda, Ken-Ichiro Imura

摘要:

研究了具有U_em(1)× U_z(1)(电磁和自旋)规范对称性的Z_2拓扑绝缘体中的超电流流动.当U_z(1)被破坏时,无耗散电流仍可能局部流动,但不存在净电荷转移,即,电流受到限制。在石墨烯的Kane-Mele模型中,这种束缚-解除束缚(超导)转变是由Rashba自旋-轨道相互作用驱动的,它打破了U_z(1)。

英文摘要:

It is shown that the electric supercurrent flows in a Z_2 topological insulator with U_em(1) X U_z(1) (electromagnetic and spin) gauge symmetries. When U_z(1) is broken, a dissipationless electric current is still possible to flow locally but net charge transfer is absent, i.e., current is confined. In the Kane-Mele model for graphene, this confining-deconfining (superconducting) transition is driven by the Rashba spin-orbit interaction, which breaks U_z(1).

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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