Hybridization of Subgap States in One-Dimensional Superconductor-Semiconductor Coulomb Islands
(2018) In Physical Review Letters 121(25).- Abstract
We present measurements of one-dimensional superconductor-semiconductor Coulomb islands, fabricated by gate confinement of a two-dimensional InAs heterostructure with an epitaxial Al layer. When tuned via electrostatic side gates to regimes without subgap states, Coulomb blockade reveals Cooper-pair mediated transport. When subgap states are present, Coulomb peak positions and heights oscillate in a correlated way with magnetic field and gate voltage, as predicted theoretically, with (anti)crossings in (parallel) transverse magnetic field indicating Rashba-type spin-orbit coupling. Overall results are consistent with a picture of overlapping Majorana zero modes in finite wires.
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https://lup.lub.lu.se/record/cb469bf9-36f1-41c5-8d41-9ac96cd1c11d
- author
- organization
- publishing date
- 2018-12-19
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review Letters
- volume
- 121
- issue
- 25
- article number
- 256803
- publisher
- American Physical Society
- external identifiers
-
- pmid:30608825
- scopus:85059126517
- ISSN
- 0031-9007
- DOI
- 10.1103/PhysRevLett.121.256803
- language
- English
- LU publication?
- yes
- id
- cb469bf9-36f1-41c5-8d41-9ac96cd1c11d
- date added to LUP
- 2019-01-11 13:56:56
- date last changed
- 2024-03-02 17:00:49
@article{cb469bf9-36f1-41c5-8d41-9ac96cd1c11d, abstract = {{<p>We present measurements of one-dimensional superconductor-semiconductor Coulomb islands, fabricated by gate confinement of a two-dimensional InAs heterostructure with an epitaxial Al layer. When tuned via electrostatic side gates to regimes without subgap states, Coulomb blockade reveals Cooper-pair mediated transport. When subgap states are present, Coulomb peak positions and heights oscillate in a correlated way with magnetic field and gate voltage, as predicted theoretically, with (anti)crossings in (parallel) transverse magnetic field indicating Rashba-type spin-orbit coupling. Overall results are consistent with a picture of overlapping Majorana zero modes in finite wires.</p>}}, author = {{O'Farrell, E. C.T. and Drachmann, A. C.C. and Hell, M. and Fornieri, A. and Whiticar, A. M. and Hansen, E. B. and Gronin, S. and Gardner, G. C. and Thomas, C. and Manfra, M. J. and Flensberg, K. and Marcus, C. M. and Nichele, F.}}, issn = {{0031-9007}}, language = {{eng}}, month = {{12}}, number = {{25}}, publisher = {{American Physical Society}}, series = {{Physical Review Letters}}, title = {{Hybridization of Subgap States in One-Dimensional Superconductor-Semiconductor Coulomb Islands}}, url = {{http://dx.doi.org/10.1103/PhysRevLett.121.256803}}, doi = {{10.1103/PhysRevLett.121.256803}}, volume = {{121}}, year = {{2018}}, }