Li Xiaoyin, Zhang Shunhong, Zhang Xiaoming, Vardeny Zeev Valy, Liu Feng
Department of Materials Science and Engineering, University of Utah, Salt Lake City, Utah 84112, United States.
International Center for Quantum Design of Functional Materials (ICQD), University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
Nano Lett. 2024 Mar 6;24(9):2705-2711. doi: 10.1021/acs.nanolett.3c04085. Epub 2024 Jan 19.
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 BAPbCl (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.
具有增强稳定性、高可调性和强自旋轨道耦合的二维（2D）有机-无机杂化钙钛矿（HOIPs）在广泛的应用中显示出巨大潜力。在此，我们将2D HOIPs本已丰富的功能扩展到一个新领域，实现用于容错量子计算的拓扑超导和马约拉纳模式。特别是，我们预测室温铁电体BAPbCl（BAPbCl中BA代表苄基铵）在与s波超导体和面内塞曼场近邻耦合时，在选定边缘和铁电畴壁上表现出拓扑节点球超导（NSC）和无隙马约拉纳模式，这对实验验证和应用具有吸引力。由于NSC受2D HOIPs的空间对称性保护，我们设想由于这类材料多样的非中心对称空间群，在其中会发现更多奇异的拓扑超导态，这可能在HOIPs和拓扑超导领域开辟一条新途径。
