期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 33, 期 49, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1361-648X/ac24c5
关键词
graphite; superconductivity; proximity effect; Dirac
资金
- National Science Center, Poland within the POLONEZ programme [2016/23/P/ST3/03514]
- European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie Grant [665778]
- FAPESP
- CNPq
- AFOSR [FA9550-17-1-0132]
- EuropeanMicrokelvin Platform (EU's H2020 project) [824109]
- National Science Center, Poland [2014/15/B/ST3/03889]
- [VA SR ITMS2014+313011W856]
- [APVV-18-0358]
- [VEGA 1/0743/19]
Proximity-induced superconducting features are observed over macroscopic lengths in highly oriented pyrolytic graphite, which is triggered by the injection of electrical currents through superconducting electrodes. This anomaly is attributed to the pre-existing superconductivity in localized regions within the graphite material.
We report proximity-induced superconducting features over macroscopic lengths in highly oriented pyrolytic graphite. The phenomenon is triggered when electrical currents are injected in the material through superconducting electrodes, few millimeters apart from each other. Such a large range is anomalous, as proximity-induced features in normal conductors hardly surpass few micrometers. The results can be explained as due to the presence of pre-existing superconductivity in graphite on small, localized regions.
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