期刊
PHYSICAL REVIEW LETTERS
卷 122, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.122.036801
关键词
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资金
- European Research Council under the European Union's H2020 program/ERC Grant [677458]
- project Quantox of QuantERA ERA-NET Cofund in Quantum Technologies
- Netherlands Organisation for Scientific Research (NWO/OCW) as part of the Frontiers of Nanoscience program (NanoFront)
- Dutch Foundation for Fundamental Research on Matter (FOM)
- European Research Council (ERC) [677458] Funding Source: European Research Council (ERC)
We explore the superconducting phase diagram of the two-dimensional electron system at the LaAlO3/SrTiO3 interface by monitoring the frequencies of the cavity modes of a coplanar waveguide resonator fabricated in the interface itself. We determine the phase diagram of the superconducting transition as a function of the temperature and electrostatic gating, finding that both the superfluid density and the transition temperature follow a dome shape but that the two are not monotonically related. The ground state of this two-dimensional electron system is interpreted as a Josephson junction array, where a transition from long-to short-range order occurs as a function of the electronic doping. The synergy between correlated oxides and superconducting circuits is revealed to be a promising route to investigate these exotic compounds, complementary to standard magnetotransport measurements.
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