Powered by Indico
v3.2.3
In this talk, I will present our recent studies on the emergent superconductivity in few-layer stanene [1][2] as well as superconductor-insulator or superconductor-metal transition induced by lithium ion intercalation [3]. In the first part, I will report the discovery of superconductivity in few-layer stanene—ultrathin gray tin (111). Few-layer stanene not only exhibits two-dimensional superconductivity but also topologically non-trivial band structures [1]. Furthermore, they host enhanced in-plane upper critical fields that greatly exceed the conventional limit. We propose that this anomalous behavior stems from a novel type of Ising pairing [2]. In the second part, I will present the application of a recently emerged solid-state gating technique. By using this technique, we are able to continuously tune a high temperature cuprate superconductor from the optimal doping to the under-doped regime [3]. We further employ this technique to induce superconductivity in titanium diselenide. Interestingly, we observe the anomalous metal phase even in relatively thick films of titanium diselenide.
References
[1] M. Liao#, Y. Zang#, D. Zhang*, Y. Xu*, Q.-K. Xue* et al. Nat. Phys. 14, 344 (2018).
[2] J. Falson, H. Liu*, J. Smet*, D. Zhang* et al. Science 367, 1454 (2020).
[3] M. Liao, D. Zhang*, Q.-K. Xue* et al. Nano Lett. 18, 5660 (2018).
2008-14 PhD, Max Planck Institute for Solid State Research, Germany
2014-16 Postdoc, Tsinghua University, China
2016-Present Associate Professor, Tsinghua University, China
Research interest: low-dimensional superconductivity, high temperature superconductivity, and low-temperature transport techniques.
Venue: TDLI Meeting Room 200
Here is the Zoom link if you prefer to join us remotely:
Meeting room: https://cernet.zoom.com.cn/j/61630149746