Symmetry conditions of a nodal superconductor for generating robust flat-band Andreev bound states at its dirty surface

• Ikegaya, Satoshi

• Kobayashi, Shingo

• Asano, Yasuhiro

抄録

We discuss the symmetry property of a nodal superconductor that hosts robust flat-band zero-energy states at its surface under potential disorder. Such robust zero-energy states are known to induce the anomalous proximity effect in a dirty normal metal attached to a superconductor. A recent study has shown that a topological index N-ZES describes the number of zero-energy states at the dirty surface of a p-wave superconductor. We generalize the theory to clarify the conditions required for a superconductor that enables N-ZES not equal 0. Our results show that N-ZES not equal 0 is realized in a topological material that belongs to either the BDI or CII class. We also present two realistic Hamiltonians that result in N-ZES not equal 0.

収録刊行物

• Physical Review B

  Physical Review B 97 (17), 174501-, 2018-05-01

  American Physical Society (APS)

詳細情報

• CRID: 1050564288980042240
• NII論文ID: 120006482597
• DOI: 10.1103/physrevb.97.174501
• ISSN: 24699969
• ISSN: 24699950
• HANDLE: 2115/70797
• Web Site: https://link.aps.org/accepted/10.1103/PhysRevB.97.174501
• Web Site: https://link.aps.org/article/10.1103/PhysRevB.97.174501
• Web Site: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevB.97.174501/fulltext
• 本文言語コード: en
• 資料種別: journal article
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