In:
Science, American Association for the Advancement of Science (AAAS), Vol. 372, No. 6543 ( 2021-05-14), p. 721-724
Abstract:
The oxide interface between LaAlO 3 and KTaO 3 (111) can harbor a superconducting state. We report that by applying a gate voltage ( V G ) across KTaO 3 , 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.
Type of Medium:
Online Resource
ISSN:
0036-8075
,
1095-9203
DOI:
10.1126/science.abb3848
Language:
English
Publisher:
American Association for the Advancement of Science (AAAS)
Publication Date:
2021
detail.hit.zdb_id:
128410-1
detail.hit.zdb_id:
2066996-3
detail.hit.zdb_id:
2060783-0
SSG:
11
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