期刊
PHYSICAL REVIEW B
卷 83, 期 22, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.83.224511
关键词
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资金
- MEXT of Japan, Topological Quantum Phenomena, [22103005, 22540383, 20654030, 22340096]
- Grants-in-Aid for Scientific Research [22540383, 22103001, 23740236, 22340096, 22103005] Funding Source: KAKEN
Theory of dispersionless Andreev bound states on surfaces of time-reversal-invariant unconventional superconductors is presented. The generalized criterion for the dispersionless Andreev bound state is derived from the bulk-edge correspondence, and the chiral spin structure of the dispersionless Andreev bound states is argued from which the Andreev bound state is stabilized. We then summarize the criterion in a form of index theorems. The index theorems are proved in a general framework to certify the bulk-edge correspondence. As concrete examples, we discuss the (i) d(xy)-wave superconductor, (ii) p(x)-wave superconductor, and (iii) noncentrosymmetric superconductors. In the last example, we find a peculiar time-reversal-invariant Majorana fermion. The time-reversal-invariant Majorana fermion shows an unusual response to the Zeeman magnetic field, which can be used to identify it experimentally.
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