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arXiv 1704.03060cond-mat.mtrl-scicond-mat.mes-hall
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正确的布里渊区和BiPd的电子结构

Correct Brillouin zone and electronic structure of BiPd

Alexander Yaresko, Andreas P. Schnyder, Hadj M. Benia, Chi-Ming Yim, Giorgio Levy, Andrea Damascelli, Christian R. Ast, Darren C. Peets, Peter Wahl

摘要:

实现马约拉纳费米子的一个有希望的途径是在非中心对称的超导体中,其中自旋轨道耦合提升了体带和表面带的自旋简并度。电子结构的详细评估对于通过建立电子结构的拓扑性质来评估其适用性至关重要。这需要正确识别时间反演不变动量。其中一种材料是BiPd,这是一种最近重新发现的非中心对称超导体,可以在大的高质量单晶中生长,并且已经由几个小组使用角分辨光电发射来研究其表面电子结构。许多已发表的电子结构的研究,这种材料是基于一个倒易单位细胞,这是不是实际的布里渊区的材料。我们在这里显示的电子结构的后果,并显示如何推断的拓扑性质的材料受到影响。

英文摘要:

A promising route to the realization of Majorana fermions is in non-centrosymmetric superconductors, in which spin-orbit-coupling lifts the spin degeneracy of both bulk and surface bands. A detailed assessment of the electronic structure is critical to evaluate their suitability for this through establishing the topological properties of the electronic structure. This requires correct identification of the time-reversal-invariant momenta. One such material is BiPd, a recently rediscovered non-centrosymmetric superconductor which can be grown in large, high-quality single crystals and has been studied by several groups using angular resolved photoemission to establish its surface electronic structure. Many of the published electronic structure studies on this material are based on a reciprocal unit cell which is not the actual Brillouin zone of the material. We show here the consequences of this for the electronic structures and show how the inferred topological nature of the material is affected.

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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