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arXiv 1902.06759cond-mat.supr-concond-mat.str-el
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应变节超导体中的相互作用Majorana费米子

Interacting Majorana fermions in strained nodal superconductors

Emilian M. Nica, Onur Erten

摘要:

朗道能级(LL)已被预测出现在狄拉克节点下施加非均匀应变的系统。本文研究了二维$d_{xy}$单线态(2D-S)和三维$p \pm i p$等自旋三线态(3D-T)超导体。我们证明了spinful马约拉纳性质的散装无间隙零-LLS。沿一定方向的应变可以在体相中诱导两个拓扑结构不同的相,第零个LLs位于界面处。这些模式是不稳定的铁磁性的2D-S的情况下。3D-T中出现的实空间马约拉纳费米子允许更多奇异的可能性。

英文摘要:

Landau levels (LL) have been predicted to emerge in systems with Dirac nodal points under applied non-uniform strain. We consider 2D, $d_{xy}$ singlet (2D-S) and 3D $p \pm i p$ equal-spin triplet (3D-T) superconductors (SCs). We demonstrate the spinful Majorana nature of the bulk gapless zeroth-LLs. Strain along certain directions can induce two topologically distinct phases in the bulk, with zeroth LLs localized at the the interface. These modes are unstable toward ferromagnetism for 2D-S cases. Emergent real-space Majorana fermions in 3D-T allow for more exotic possibilities.

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