Metallic ground state in an ion-gated two-dimensional superconductor

@article{Saito2015MetallicGS,
  title={Metallic ground state in an ion-gated two-dimensional superconductor},
  author={Yu Saito and Y. Kasahara and Jianting Ye and Y. Iwasa and T. Nojima},
  journal={Science},
  year={2015},
  volume={350},
  pages={409 - 413}
}
A 3D approach to make 2D superconductors When the thickness of a superconducting film becomes comparable to the typical size of its electron pairs, its superconductivity enters a two-dimensional (2D) regime. Thinner films usually have higher amounts of disorder, making it difficult to isolate the 2D effects. To circumvent this limitation, Saito et al. induced charge carriers on the surface of the 3D insulator ZrNCl. This approach produced a clean superconducting layer thinner than the unit cell… Expand
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References

SHOWING 1-10 OF 53 REFERENCES
Superconductor–insulator transition in La2 − xSrxCuO4 at the pair quantum resistance
High-temperature superconductivity in copper oxides arises when a parent insulator compound is doped beyond some critical concentration; what exactly happens at this superconductor–insulatorExpand
Electric-field-induced superconductivity in an insulator.
TLDR
Electric-field-induced superconductivity in an insulator is reported by using an electric-double-layer gating in an organic electrolyte using a pristine SrTiO(3) single-crystal channel, indicating this method as promising for searching for unprecedented superconducting states. Expand
Superconductivity at the Two-Dimensional Limit
TLDR
The result shows that Cooper pairs can still form in the last two-dimensional channel of electron states, although their binding is strongly affected by the substrate. Expand
Liquid-gated interface superconductivity on an atomically flat film.
TLDR
The present result reveals that the EDLT is an extremely versatile tool to induce electronic phase transitions by electrostatic charge accumulation and provides new routes in the search for superconductors beyond those synthesized by traditional chemical methods. Expand
Electrostatically induced superconductivity at the surface of WS₂.
TLDR
This work investigates transport through ionic liquid gated field effect transistors (FETs) based on exfoliated crystals of semiconducting WS2 and finds that in all cases where a fully developed zero resistance state is observed, different properties of the devices exhibit a behavior characteristic of a Berezinskii-Kosterlitz-Thouless transition. Expand
High-temperature interface superconductivity between metallic and insulating copper oxides
The realization of high-transition-temperature (high-Tc) superconductivity confined to nanometre-sized interfaces has been a long-standing goal because of potential applications and the opportunityExpand
Two-dimensional superconductor-insulator quantum phase transitions in an electron-doped cuprate
We use ionic liquid-assisted electric field effect to tune the carrier density in an electron-doped cuprate ultrathin film and cause a two-dimensional superconductor-insulator transition (SIT). TheExpand
Effective thickness of two-dimensional superconductivity in a tunable triangular quantum well of SrTiO 3
We report two-dimensionality and effective thickness of the superconductivity of a SrTiO single-crystal surface induced by electric double-layer gating. The carrier density was tuned from 3Expand
Discovery of superconductivity in KTaO₃ by electrostatic carrier doping.
TLDR
The present result clearly shows that electrostatic carrier doping can lead to new states of matter at nanoscale interfaces and can induce superconductivity in KTaO(3), a material in whichsuperconductivity has not been observed before. Expand
High-Tc superconductivity in ultrathin Bi2Sr2CaCu2O(8+x) down to half-unit-cell thickness by protection with graphene.
TLDR
A method to fabricate high quality single-crystal Bi2212 films down to half-unit-cell thickness in the form of graphene/Bi2212 van der Waals heterostructure, in which sharp superconducting transitions are observed, indicating a surprising decoupling of the normal state resistance and superconductivity. Expand
...
1
2
3
4
5
...