English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

A dome-shaped phase diagram of superconducting critical temperature upondoping is often considered as a hallmark of unconventional superconductors.This behavior, observed in two-dimensional electron gases in$\mathrm{SrTiO}_3$-based interfaces whose electronic density is controlled byfield effect, has not been explained unambiguously yet. Here, we elaborate ageneric scenario for the superconducting phase diagram of these oxideinterfaces based on Schr\"odinger-Poisson numerical simulations of the quantumwell and transport experiments on a double-gate field-effect device. We proposethat the optimal doping point of maximum $T_c$ marks the transition between asingle-band and a fragile two-gap s$\pm$-wave superconducting state involving$t_{2g}$ bands of different orbital character. At the optimal doping point, wepredict and observe experimentally a bifurcation in the dependence of $T_c$ onthe carrier density, which is controlled by the details of the dopingexecution. Where applying a back-gate voltage triggers the filling of ahigh-energy $d_\mathrm{xy}$ subband and initiates the overdoped regime, dopingwith a top-gate delays the filling of the subband and maintains the 2-DEG inthe single-band superconducting state of higher $T_c$.

Origin of the dome-shaped superconducting phase diagram in $\mathrm{SrTiO}_3$-based interfaces