期刊
PHYSICAL REVIEW LETTERS
卷 109, 期 10, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.106404
关键词
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资金
- JQI-NSF-PFC
- Microsoft-Q
- DARPA-QuEST
- Division Of Physics
- Direct For Mathematical & Physical Scien [822671] Funding Source: National Science Foundation
We study the charge character of the Andreev bound states (ABSs) in one-dimensional topological superconductors with spatial inversion symmetry (SIS) breaking. Despite the absence of the SIS, we show a hidden symmetry for the Bogoliubov-de Gennes equations around Fermi points in addition to the particle-hole symmetry. This hidden symmetry protects that the charge of the ABSs is solely dependent on the corresponding Fermi velocities. On the other hand, if the SIS is present, the ABSs are charge neutral, similar to Majorana fermions. We also propose that the charge of the ABSs can be experimentally measured in the tunneling transport spectroscopy from the resonant differential tunneling conductance.
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