期刊
PHYSICAL REVIEW B
卷 95, 期 15, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.95.155420
关键词
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资金
- Ministry of Science and Technology of China (MOST) through the National Key Basic Research Program of China [2012CB932703, 2012CB932700, 2016YFA0300601]
- National Natural Science Foundation of China [91221202, 91421303, 61321001, 11604005]
- Swedish Research Council (VR)
- China Postdoctoral Science Foundation [2016M591001]
- Ministry of Science and Technology of China (MOST) through the National Key Basic Research Program of China [2012CB932703, 2012CB932700, 2016YFA0300601]
- National Natural Science Foundation of China [91221202, 91421303, 61321001, 11604005]
- Swedish Research Council (VR)
- China Postdoctoral Science Foundation [2016M591001]
Signatures of Majorana-fermion bound states in one-dimensional topological-insulator (TI) nanowires with proximity-effect-induced superconductivity are studied. The phase diagram and energy spectra are calculated for single-TI nanowires, and it is shown that the nanowires can be in the topologically invariant phases of winding numbersW = 0,+/- 1, and +/- 2, corresponding to the cases with zero, one, and two pairs of Majorana fermions in the single-TI nanowires. It is also shown that the topological winding numbers, i.e., the numbers of pairs of Majorana fermions in the TI nanowires, can be extracted from the transport measurements of a Josephson-junction device made from two TI nanowires, while the sign in the winding numbers can be extracted using a superconducting quantum interference device setup.
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