Superconductivity in AuNiGe Ohmic contacts to a GaAs-based high mobility two-dimensional electron gas
- Submitting institution
-
Royal Holloway and Bedford New College
- Unit of assessment
- 12 - Engineering
- Output identifier
- 39352311
- Type
- D - Journal article
- DOI
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10.1063/5.0028217
- Title of journal
- Applied Physics Letters
- Article number
- 162104
- First page
- 1
- Volume
- 117
- Issue
- 16
- ISSN
- 0003-6951
- Open access status
- Compliant
- Month of publication
- October
- Year of publication
- 2020
- URL
-
-
- Supplementary information
-
-
- Request cross-referral to
- -
- Output has been delayed by COVID-19
- No
- COVID-19 affected output statement
- -
- Forensic science
- No
- Criminology
- No
- Interdisciplinary
- No
- Number of additional authors
-
10
- Research group(s)
-
-
- Proposed double-weighted
- No
- Reserve for an output with double weighting
- No
- Additional information
- The paper describes the unexpected discovery that AuNiGe ohmic contacts to a two-dimensional electron gas (2DEG) formed at a GaAs-AlGaAs heterostructure become superconducting below 1 K. High mobility GaAs-based 2DEGs have been the workhorse for the investigation of correlated low-dimensional electrons since the 1990s, allowing studies in a plane (2D), a wire (1D) or a quantum dot (0D). The observed superconductivity explains why it has been historically difficult to achieve electron temperatures below 4 mK. Using our increased understanding we have achieved (unpublished) for the first time electron temperatures less than 1 mK in a 2DEG.
- Author contribution statement
- -
- Non-English
- No
- English abstract
- -
