Anisotropic Superconductivity in Atomically Thin (Sn<sub>x</sub>In<sub>1-x</sub>)Bi<sub>2</sub>Te<sub>4</sub>
ORAL
Abstract
Combining superconductivity with non-trivial band topology has been an emerging research area in recent years. It is especially appealing to identify material candidates in the van der Waals family of compounds where atomically thin films may allow the control of carrier density and disentanglement of bulk and topological states. In this talk, I will describe our progress in measuring and understanding the thickness-dependent electronic response of topological superconductor candidate (Sn1-xInx)Bi2Te4. By decreasing the thickness from bulk to several layers we observe an increase in anisotropy of the superconducting state with high in-plane critical fields. Furthermore, I will discuss non-linear transport measurements above the critical temperature and their implications for the nature of superconductivity in this material.
*A portion of this work was performed at the National High Magnetic Field Laboratory, which is supported by National Science Foundation Cooperative Agreement No. DMR-2128556 and the State of Florida. More of this work was performed using the facilities of the University of Washington Molecular Engineering Materials Center (MEM-C), supported by the National Science Foundation Award No. DMR-1719797. Author Ovchinnikov, D. acknowledges the University of Kansas startup funding and KU Research GO award number 1004170. Author Barlow, J. acknowledges Air Force Office of Scientific Research Award No. FA9550-21-1-0177.
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Publication:Michael A. McGuire et al., "Superconductivity by Alloying the Topological Insulator SnBi2Te4," Physical Review Materials 7, no. 3 (March 31, 2023): 034802, https://doi.org/10.1103/PhysRevMaterials.7.034802.
Presenters
Jack M Barlow
University of Washington
Authors
Jack M Barlow
University of Washington
David E Graf
Florida State University
National High Magnetic Fields Laboratory, Florida State University
National High Magnetic Field Laboratory, Florida State University
Jared Madsen
University of Kansas
Salman Ahsanullah
University of Kansas
Chaowei Hu
University of Washington, Seattle
University of Washington
Jiaqi Cai
University of Washington
Jordan M Fonseca
University of Washington
Zhaoyu Liu
University of Washington
Jiun-Haw Chu
University of Washington
Department of Physics, University of Washington, Seattle, WA 98105
