Topological Nodal-Point Superconductivity in Two-Dimensional Ferroelectric Hybrid Perovskites
ORAL
Abstract
Two-dimensional (2D) hybrid organic-inorganic perovskites (HOIPs) with enhanced stability, high tunability, and strong spin-orbit coupling have shown great potential in vast applications. Here, we extend the already rich functionality of 2D HOIPs to a new territory, realizing topological superconductivity and Majorana modes for fault-tolerant quantum computation. Especially, we predict that room-temperature ferroelectric BA2PbCl4 (BA for benzylammonium) exhibits topological nodal-point superconductivity (NSC) and gapless Majorana modes on selected edges and ferroelectric domain walls when proximity-coupled to an s-wave superconductor and an in-plane Zeeman field, attractive for experimental verification and application. Since NSC is protected by spatial symmetry of 2D HOIPs, we envision more exotic topological superconducting states to be found in this class of materials due to their diverse noncentrosymmetric space groups, which may open a new avenue in the fields of HOIPs and topological superconductivity.
*X.L. and F.L. acknowledge financial support from the DOE-BES (No. DE-FG02-04ER46148). X.L. acknowledges also the National Science Foundation (No. 2326228). S.Z. acknowledges financial support by the National Natural Science Foundation of China (No. 11904350) and Anhui Provincial National Natural Science Foundation (2008085QA30). X.Z. acknowledges financial support by the National Natural Science Foundation of China (No. 12004357), the Natural Science Foundation of Shandong Province (No. ZR2020QA053), and the Young Talents Project at Ocean University of China. Z.V.V. acknowledges support from the DOE-BES (Grant DESC0014579). Computational resources for this work were supported by CHPC of the University of Utah and the DOE-NERSC.
