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Lecture

CANCELLED - Joan van der Waals colloquium

Date
Friday 20 March 2020
Time
Explanation
Drinks afterwards.
Location
Oort
Niels Bohrweg 2
2333 CA Leiden
Room
De Sitterzaal

Field-Induced Superconductivity in Transition Metal Dichalcogenides

A special type of field-effect gating called ionic gating was recently proved to be an effective way to dope various materials electrostatically and tune their quantum phase transition. The ionic gating was implemented by introducing an electric double-layer transistor, the electrochemical version of a conventional field-effect transistor (FET). Highly efficient FETs can be made capable of accumulating dense carriers (~1014 cm-2) mediated by the movement of organic ions at the transistor channel surface. In this talk, I will focus on the experimental efforts using ionic gating as an effective tool to induce and control 2D superconductivity in semiconducting transition metal dichalcogenides down to one monolayer. The gate-induced carriers experience both Rashba and Zeeman type spin-orbit interaction forming so-called Ising pairing. The spin configuration is strongly protected by the Zeeman type effective magnetic field, making this paring state one of the most resilient superconductors against the in-plane magnetic field.

[1] O. Zheliuk, JM Lu, Q. H. Chen, A. A. El Yumin, S. Golightly, J. T. Ye, Nature nanotechnology 14, 1123 (2019)

[2] J.M. Lu, O. Zheliuk, Q.H. Chen, I. Leermakers, N.E. Hussey, U. Zeitler, and J. T. Ye, PNAS 115, 3551(2018).

[3] J. M. Lu, O. Zheliuk, I. Leermakers, Noah F. Q. Yuan, U. Zeitler, K. T. Law, and J. T. Ye, Science 350, 1353 (2015).

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