Majorana fermions in topological-insulator nanowires : From single superconducting nanowires to Josephson junctions
(2017) In Physical Review B - Condensed Matter and Materials Physics 95(15).- Abstract
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 numbers W=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... (More)
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 numbers W=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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- author
- Huang, Guang Yao and Xu, H. Q. LU
- organization
- publishing date
- 2017-04-13
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review B - Condensed Matter and Materials Physics
- volume
- 95
- issue
- 15
- article number
- 155420
- publisher
- American Physical Society
- external identifiers
-
- wos:000401764100003
- scopus:85017641732
- ISSN
- 1098-0121
- DOI
- 10.1103/PhysRevB.95.155420
- language
- English
- LU publication?
- yes
- id
- 3f1efdf5-f3e0-4f60-882c-ec1a87dc7a95
- date added to LUP
- 2017-05-08 11:58:36
- date last changed
- 2025-01-07 12:42:42
@article{3f1efdf5-f3e0-4f60-882c-ec1a87dc7a95,
abstract = {{<p>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 numbers W=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.</p>}},
author = {{Huang, Guang Yao and Xu, H. Q.}},
issn = {{1098-0121}},
language = {{eng}},
month = {{04}},
number = {{15}},
publisher = {{American Physical Society}},
series = {{Physical Review B - Condensed Matter and Materials Physics}},
title = {{Majorana fermions in topological-insulator nanowires : From single superconducting nanowires to Josephson junctions}},
url = {{http://dx.doi.org/10.1103/PhysRevB.95.155420}},
doi = {{10.1103/PhysRevB.95.155420}},
volume = {{95}},
year = {{2017}},
}