Superconductor-nanowire devices from tunneling to the multichannel regime: Zero-bias oscillations and magnetoconductance crossover
(2013) In Physical Review B (Condensed Matter and Materials Physics) 87(24).- Abstract
- We present transport measurements in superconductor-nanowire devices with a gated constriction forming a quantum point contact. Zero-bias features in tunneling spectroscopy appear at finite magnetic fields and oscillate in amplitude and split away from zero bias as a function of magnetic field and gate voltage. A crossover in magnetoconductance is observed: Magnetic fields above similar to 0.5 T enhance conductance in the low-conductance (tunneling) regime but suppress conductance in the high-conductance (multichannel) regime. We consider these results in the context of Majorana zero modes as well as alternatives, including the Kondo effect and analogs of 0.7 structure in a disordered nanowire.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3990284
- author
- Churchill, H. O. H. ; Fatemi, V. ; Grove-Rasmussen, K. ; Deng, Mingtang LU ; Caroff, Philippe LU ; Xu, Hongqi LU and Marcus, C. M.
- organization
- publishing date
- 2013
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review B (Condensed Matter and Materials Physics)
- volume
- 87
- issue
- 24
- article number
- 241401
- publisher
- American Physical Society
- external identifiers
-
- wos:000320108700001
- scopus:84879022519
- ISSN
- 1098-0121
- DOI
- 10.1103/PhysRevB.87.241401
- language
- English
- LU publication?
- yes
- id
- 0f04c549-4915-4ad7-8401-df529871172e (old id 3990284)
- date added to LUP
- 2016-04-01 14:59:51
- date last changed
- 2023-11-13 14:31:50
@article{0f04c549-4915-4ad7-8401-df529871172e, abstract = {{We present transport measurements in superconductor-nanowire devices with a gated constriction forming a quantum point contact. Zero-bias features in tunneling spectroscopy appear at finite magnetic fields and oscillate in amplitude and split away from zero bias as a function of magnetic field and gate voltage. A crossover in magnetoconductance is observed: Magnetic fields above similar to 0.5 T enhance conductance in the low-conductance (tunneling) regime but suppress conductance in the high-conductance (multichannel) regime. We consider these results in the context of Majorana zero modes as well as alternatives, including the Kondo effect and analogs of 0.7 structure in a disordered nanowire.}}, author = {{Churchill, H. O. H. and Fatemi, V. and Grove-Rasmussen, K. and Deng, Mingtang and Caroff, Philippe and Xu, Hongqi and Marcus, C. M.}}, issn = {{1098-0121}}, language = {{eng}}, number = {{24}}, publisher = {{American Physical Society}}, series = {{Physical Review B (Condensed Matter and Materials Physics)}}, title = {{Superconductor-nanowire devices from tunneling to the multichannel regime: Zero-bias oscillations and magnetoconductance crossover}}, url = {{http://dx.doi.org/10.1103/PhysRevB.87.241401}}, doi = {{10.1103/PhysRevB.87.241401}}, volume = {{87}}, year = {{2013}}, }