Macroscopic-ranged proximity effect in graphite
arXiv:1902.03181 · doi:10.1088/1361-648X/ac24c5
Abstract
We report the observation of proximity effect in measurements performed on highly oriented pyrolitic graphite (HOPG) samples when electrical current is injected through the superconducting electrodes placed on the sample surface few millimeters apart from each other. Such anomalously large effect is surprising, as proximity-induced superconducting features in normal conductors hardly surpass few micrometers. The obtained results can be consistently understood, however, considering pre-existing superconducting correlations in graphite, supported by recent observations of the intrinsic global superconductivity in twisted bi- and multi-layer graphenes.
7 figures, 8 pages
References in corpus (14)
- Magic-angle graphene superlattices: a new platform for unconventional superconductivity
- Bipolar supercurrent in graphene
- Charge-Order and Broken Rotational Symmetry in Magic Angle Twisted Bilayer Graphene
- Spectroscopic signatures of many-body correlations in magic angle twisted bilayer graphene
- First direct observation of Dirac fermions in graphite
- Electronic properties of graphene: a perspective from scanning tunneling microscopy and magneto-transport
- Metal-Insulator-Like Behavior in Semimetallic Bismuth and Graphite
- Phase controlled superconducting proximity effect probed by tunneling spectroscopy
- Robust spin-polarized midgap states at step edges of topological crystalline insulators
- Identification of a possible superconducting transition above room temperature in natural graphite crystals
- Robustness and Universality of Surface States in Dirac Materials
- Giant proximity effect in a phase-fluctuating superconductor
- Granular superconductivity below 5~K in SPI-II pyrolytic graphite
- Effect of structural disorder on quantum oscillations in graphite