---
_id: '15367'
abstract:
- lang: eng
text: Two-dimensional semiconductor-superconductor heterostructures form the foundation
of numerous nanoscale physical systems. However, measuring the properties of such
heterostructures, and characterizing the semiconductor in-situ is challenging.
A recent experimental study by [Phys. Rev. Lett. 128, 107701 (2022)] was able
to probe the semiconductor within the heterostructure using microwave measurements
of the superfluid density. This work revealed a rapid depletion of superfluid
density in semiconductor, caused by the in-plane magnetic field which in presence
of spin-orbit coupling creates so-called Bogoliubov Fermi surfaces. The experimental
work used a simplified theoretical model that neglected the presence of non-magnetic
disorder in the semiconductor, hence describing the data only qualitatively. Motivated
by experiments, we introduce a theoretical model describing a disordered semiconductor
with strong spin-orbit coupling that is proximitized by a superconductor. Our
model provides specific predictions for the density of states and superfluid density.
Presence of disorder leads to the emergence of a gapless superconducting phase,
that may be viewed as a manifestation of Bogoliubov Fermi surface. When applied
to real experimental data, our model showcases excellent quantitative agreement,
enabling the extraction of material parameters such as mean free path and mobility,
and estimating g-tensor after taking into account the orbital contribution of
magnetic field. Our model can be used to probe in-situ parameters of other superconductor-semiconductor
heterostructures and can be further extended to give access to transport properties.
acknowledgement: "We acknowledge useful discussions with M. Geier, A. Levchenko, B.
Ramshaw, T. Scaffidi, and\r\nJ. Shabani. This research was funded by the Austrian
Science Fund (FWF) F 86.\r\nFor the purpose of open access, authors have applied
a CC BY public copyright licence to any\r\nAuthor Accepted Manuscript version arising
from this submission. MS acknowledges hospitality of KITP supported in part by the
National Science Foundation under Grants No. NSF\r\nPHY-1748958 and PHY-2309135.
APH acknowledges the support of the NOMIS foundation."
article_number: '115'
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: Serafim
full_name: Babkin, Serafim
id: 41e64307-6672-11ee-b9ad-cc7a0075a479
last_name: Babkin
orcid: 0009-0003-7382-8036
- first_name: Andrew P
full_name: Higginbotham, Andrew P
id: 4AD6785A-F248-11E8-B48F-1D18A9856A87
last_name: Higginbotham
orcid: 0000-0003-2607-2363
- first_name: Maksym
full_name: Serbyn, Maksym
id: 47809E7E-F248-11E8-B48F-1D18A9856A87
last_name: Serbyn
orcid: 0000-0002-2399-5827
citation:
ama: Babkin S, Higginbotham AP, Serbyn M. Proximity-induced gapless superconductivity
in two-dimensional Rashba semiconductor in magnetic field. SciPost Physics.
2024;16(5). doi:10.21468/scipostphys.16.5.115
apa: Babkin, S., Higginbotham, A. P., & Serbyn, M. (2024). Proximity-induced
gapless superconductivity in two-dimensional Rashba semiconductor in magnetic
field. SciPost Physics. SciPost Foundation. https://doi.org/10.21468/scipostphys.16.5.115
chicago: Babkin, Serafim, Andrew P Higginbotham, and Maksym Serbyn. “Proximity-Induced
Gapless Superconductivity in Two-Dimensional Rashba Semiconductor in Magnetic
Field.” SciPost Physics. SciPost Foundation, 2024. https://doi.org/10.21468/scipostphys.16.5.115.
ieee: S. Babkin, A. P. Higginbotham, and M. Serbyn, “Proximity-induced gapless superconductivity
in two-dimensional Rashba semiconductor in magnetic field,” SciPost Physics,
vol. 16, no. 5. SciPost Foundation, 2024.
ista: Babkin S, Higginbotham AP, Serbyn M. 2024. Proximity-induced gapless superconductivity
in two-dimensional Rashba semiconductor in magnetic field. SciPost Physics. 16(5),
115.
mla: Babkin, Serafim, et al. “Proximity-Induced Gapless Superconductivity in Two-Dimensional
Rashba Semiconductor in Magnetic Field.” SciPost Physics, vol. 16, no.
5, 115, SciPost Foundation, 2024, doi:10.21468/scipostphys.16.5.115.
short: S. Babkin, A.P. Higginbotham, M. Serbyn, SciPost Physics 16 (2024).
corr_author: '1'
date_created: 2024-05-06T09:02:18Z
date_published: 2024-05-01T00:00:00Z
date_updated: 2025-09-04T13:53:20Z
day: '01'
ddc:
- '530'
department:
- _id: MaSe
- _id: AnHi
doi: 10.21468/scipostphys.16.5.115
external_id:
arxiv:
- '2311.09347'
isi:
- '001215855200002'
file:
- access_level: open_access
checksum: f999204856417dcf5a736ac8df432b96
content_type: application/pdf
creator: dernst
date_created: 2024-05-07T12:58:47Z
date_updated: 2024-05-07T12:58:47Z
file_id: '15369'
file_name: 2024_SciPostPhys_Babkin.pdf
file_size: 2733685
relation: main_file
success: 1
file_date_updated: 2024-05-07T12:58:47Z
has_accepted_license: '1'
intvolume: ' 16'
isi: 1
issue: '5'
language:
- iso: eng
month: '05'
oa: 1
oa_version: Published Version
project:
- _id: eb9b30ac-77a9-11ec-83b8-871f581d53d2
name: Protected states of quantum matter
- _id: 34a7f947-11ca-11ed-8bc3-c5dc2bbaae25
grant_number: F8609
name: 'Center for Correlated Quantum Materials and Solid State Quantum Systems: Probing
topology in circuits and quantum materials'
publication: SciPost Physics
publication_identifier:
issn:
- 2542-4653
publication_status: published
publisher: SciPost Foundation
quality_controlled: '1'
scopus_import: '1'
status: public
title: Proximity-induced gapless superconductivity in two-dimensional Rashba semiconductor
in magnetic field
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 16
year: '2024'
...