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Observation of two-dimensional superconductivity at the LaAlO3/KTaO3(110) heterointerface
- Source :
- Phys. Rev. Lett. 126, 026802 (2021)
- Publication Year :
- 2020
-
Abstract
- We report on the observation of a Tc ~0.9 K superconductivity at the interface between LaAlO3 film and the 5d transition-metal oxide KTaO3(110) single crystal. The interface shows a large anisotropy of the upper critical field, and its superconducting transition is consistent with a Berezinskii-Kosterlitz-Thouless transition. Both facts suggest that the superconductivity is two-dimensional (2D) in nature. The carrier density measured at 5 K is ~7 time 10^13 cm-2. The superconducting layer thickness and coherence length are estimated to be ~8 and ~30 nm, respectively. Our result provides a new platform for the study of 2D superconductivity at oxide interfaces.<br />Comment: 10 pages, 4 figures for main text; plus 6 pages, 8 figures for supplemental materials
- Subjects :
- Condensed Matter - Superconductivity
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. Lett. 126, 026802 (2021)
- Publication Type :
- Report
- Accession number :
- edsarx.2011.08526
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevLett.126.026802