Electric field control of superconductivity at the LaAlO3/KTaO3(111) interface.
Science
; 372(6543): 721-724, 2021 05 14.
Article
en En
| MEDLINE
| ID: mdl-33986177
ABSTRACT
The oxide interface between LaAlO3 and KTaO3(111) can harbor a superconducting state. We report that by applying a gate voltage (V G) across KTaO3, the interface can be continuously tuned from superconducting into insulating states, yielding a dome-shaped T c-V G dependence, where T c is the transition temperature. The electric gating has only a minor effect on carrier density but a strong one on mobility. We interpret the tuning of mobility in terms of change in the spatial profile of the carriers in the interface and hence, effective disorder. As the temperature is decreased, the resistance saturates at the lowest temperature on both superconducting and insulating sides, suggesting the emergence of a quantum metallic state associated with a failed superconductor and/or fragile insulator.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Science
Año:
2021
Tipo del documento:
Article
País de afiliación:
China