Tuning superconductivity in twisted bilayer graphene
Columbia University · University of California, Santa Barbara · +2 more institutions
Abstract
Materials with flat electronic bands often exhibit exotic quantum phenomena owing to strong correlations. An isolated low-energy flat band can be induced in bilayer graphene by simply rotating the layers by 1.1°, resulting in the appearance of gate-tunable superconducting and correlated insulating phases. In this study, we demonstrate that in addition to the twist angle, the interlayer coupling can be varied to precisely tune these phases. We induce superconductivity at a twist angle larger than 1.1°-in which correlated phases are otherwise absent-by varying the interlayer spacing with hydrostatic pressure. Our low-disorder devices reveal details about the superconducting phase diagram and its relationship to…
Citation impact
- FWCI
- 105.90
- Percentile
- 100%
- References
- 54
Authors
9- MYMatthew YankowitzCorresponding
Columbia University
- SCShaowen ChenCorresponding
Columbia University
- HPHryhoriy PolshynCorresponding
University of California, Santa Barbara
- YZYuxuan Zhang
University of California, Santa Barbara
- KWK. Watanabe
National Institute for Materials Science
Topics & keywords
- Bilayer graphene
- Superconductivity
- Bilayer
- Twist
- Phase diagram
- Graphene
- Phase (matter)