Two-dimensional superconductivity at the surfaces of KTaO3 gated with ionic liquid

@article{Ren2022TwodimensionalSA,
  title={Two-dimensional superconductivity at the surfaces of KTaO3 gated with ionic liquid},
  author={Tianshuang Ren and Miaocong Li and Xikang Sun and Le Ju and Yuan Liu and Siyuan Hong and Yanqiu Sun and Q. Tao and Yi Zhou and Zhu-An Xu and Yanwu Xie},
  journal={Science Advances},
  year={2022},
  volume={8}
}
The recent discovery of superconductivity at the interfaces between KTaO3 and EuO (or LaAlO3) gives birth to the second generation of oxide interface superconductors. This superconductivity exhibits a strong dependence on the surface plane of KTaO3, in contrast to the seminal LaAlO3/SrTiO3 interface, and the superconducting transition temperature Tc is enhanced by one order of magnitude. For understanding its nature, a crucial issue arises: Is the formation of oxide interfaces indispensable for… 
View on PubMed
arxiv.org
6 Citations
Background Citations
1
Results Citations
1

6 Citations

Tunable superconductivity and its origin at KTaO3 interfaces

What causes Cooper pairs to form in unconventional superconductors is often elusive because experimental signatures that connect to a specific pairing mechanism are rare. Here, we observe distinct…

Tunable superconductivity at the oxide-insulator/KTaO$_3$ interface and its origin

Superconductivity forms out of the condensation of Cooper pairs of electrons. The mechanism by which Cooper pairs are created in non-conventional superconductors is often elusive because experimental…

Superconductivity in epitaxially grown LaVO3/KTaO3(111) heterostructures

Complex oxide heterointerfaces can host a rich of emergent phenomena, and epitaxial growth is usually at the heart of forming these interfaces. Recently, a strong crystalline-orientation-dependent…

Quasi-two-dimensional superconductivity at oxide heterostructures

Oxide interfaces manifest many fascinating phenomena with synergetic correlations among multiple degrees of freedom, including the interplay of broken symmetry, lattice mismatch, charge transfer,…

Effects of growth temperature, oxygen pressure, laser fluence and postannealing on transport properties of superconducting LaAlO3/KTaO3(111) interfaces

The recent discovery of superconductivity at EuO (or LaAlO3)/KTaO3 interfaces has attracted considerable research interest. However, an extensive study on growth of these interfaces is still lacking.…

Advanced Strategies in Synthesis of Two-Dimensional Materials with Different Compositions and Phases.

In recent years, 2D materials-Ma Xb with different compositions and phases have attracted tremendous attention due to their diverse structures and electronic features. The common thermodynamically…

References

SHOWING 1-10 OF 27 REFERENCES

Two-dimensional superconductivity and anisotropic transport at KTaO3 (111) interfaces

In EuO/KTaO3 (111) samples, a spontaneous in-plane transport anisotropy is observed before the onset of superconductivity, suggesting the emergence of a distinct “stripe”-like phase, which is revealed near the critical field.

Superconductor-Metal Quantum Transition at the EuO/KTaO3 Interface

Superconductivity has been one of the most fascinating quantum states of matter for over several decades. Among the superconducting materials, LaAlO3/SrTiO3 interface is of particularly interest…

Electric field control of superconductivity at the LaAlO3/KTaO3(111) interface

By applying a gate voltage (VG) across KTaO3, the interface can be continuously tuned from superconducting into insulating states, yielding a dome-shaped Tc-VG dependence, where Tc is the transition temperature.

Discovery of superconductivity in KTaO₃ by electrostatic carrier doping.

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.

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

It is reported that an ion-gated zirconium nitride chloride surface, exhibiting a dome-shaped phase diagram with a maximum critical temperature of 14.8 kelvin, behaves as a superconductor persisting to the 2D limit.

Anisotropic superconductivity and frozen electronic states at the (111) LaAlO3/SrTiO3 interface

In spite of Anderson's theorem, disorder is known to affect superconductivity in conventional s-wave superconductors. In most superconductors, the degree of disorder is fixed during sample…

Two-dimensional superconductivity at a Mott insulator/band insulator interface LaTiO3/SrTiO3.

Despite the expected electronic correlations, LaTiO(3)/SrTiO (3) heterostructures undergo a superconducting transition at a critical temperature T(c)(onset)~300 mK and are found to be confined over a typical thickness of 12 nm and is located mostly on the SrTi O(3) substrate.

Interface superconductor with gap behaviour like a high-temperature superconductor

Tunnel spectroscopy with planar junctions is used to measure the behaviour of the electronic spectral density of states as a function of carrier density, implying that the smooth continuation of the superconducting gap into pseudogap-like behaviour could be a general property of 2D superconductivity.

Two-dimensional superconductivity at (110) LaAlO3/SrTiO3 interfaces

Novel low dimensional quantum phenomena at (110) LaAlO3/SrTiO3 (LAO/STO) interfaces are expected after the quasi two dimensional electron gas similar to that of (001) LAO/STO interfaces was found at…

Two-Dimensional Superconductivity at the LaAlO_{3}/KTaO_{3}(110) Heterointerface.

We report on the observation of a T_{c}∼0.9  K superconductivity at the interface between LaAlO_{3} film and the 5d transition metal oxide KTaO_{3}(110) single crystal. The interface shows a large…