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arXiv 2108.05360cond-mat.supr-concond-mat.str-el
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拓扑使能超导性

Topologically enabled superconductivity

Michael A. Rampp, Elio J. König, Jörg Schmalian

摘要:

马约拉纳零模是一维拓扑超导性的一个广受欢迎的结果。在这里,我们表明,反过来,零模式伴随动态瞬子事件强烈增强-在某些情况下,甚至使-超导性。我们发现一维拓扑三重态超导体的动力学行为受作用量中的$θ$项控制。对于各向同性三重态,这个项使代数电荷- $2e$超导性成为可能,而非拓扑超导体的涨落会破坏这种超导性。对于各向异性三重态,零模抑制量子相位滑移,并在相图的大区域上稳定超导性。我们提出了拓扑增强超导态的关联函数和热力学的预测。

英文摘要:

Majorana zero modes are a much sought-after consequence of one-dimensional topological superconductivity. Here, we show that, in turn, zero modes accompanying dynamical instanton events strongly enhance -- in some cases even enable -- superconductivity. We find that the dynamics of a one-dimensional topological triplet superconductor is governed by a $θ$ term in the action. For isotropic triplets, this term enables algebraic charge-$2e$ superconductivity, which is destroyed by fluctuations in nontopological superconductors. For anisotropic triplets, zero modes suppress quantum phase slips and stabilize superconductivity over a large region of the phase diagram. We present predictions of correlation functions and thermodynamics for states of topologically enhanced superconductivity.

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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