气候变化领域集成服务门户(CCPortal): Phase-induced topological superconductivity in a planar heterostructure

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DOI	10.1073/pnas.2107377118
	Phase-induced topological superconductivity in a planar heterostructure
	Lesser O.; Saydjari A.; Wesson M.; Yacoby A.; Oreg Y.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:27
英文摘要	Topological superconductivity in quasi-one-dimensional systems is a novel phase of matter with possible implications for quantum computation. Despite years of effort, a definitive signature of this phase in experiments is still debated. A major cause of this ambiguity is the side effects of applying a magnetic field: induced in-gap states, vortices, and alignment issues. Here we propose a planar semiconductor-superconductor heterostructure as a platform for realizing topological superconductivity without applying a magnetic field to the two-dimensional electron gas hosting the topological state. Time-reversal symmetry is broken only by phase biasing the proximitizing superconductors, which can be achieved using extremely small fluxes or bias currents far from the quasi-one-dimensional channel. Our platform is based on interference between this phase biasing and the phase arising from strong spin-orbit coupling in closed electron trajectories. The principle is demonstrated analytically using a simple model, and then shown numerically for realistic devices. We show a robust topological phase diagram, as well as explicit wavefunctions of Majorana zero modes. We discuss experimental issues regarding the practical implementation of our proposal, establishing it as an accessible scheme with contemporary experimental techniques. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Majorana zero modes; Topological phases of matter; Topological superconductivity
语种	英语
scopus关键词	Article; chemical structure; engineering; geometry; magnetic field; model; physical phase; superconductivity
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238492
作者单位	Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, 7610001, Israel; Department of Physics, Harvard University, Cambridge, MA 02138, United States; John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, United States
推荐引用方式 GB/T 7714	Lesser O.,Saydjari A.,Wesson M.,et al. Phase-induced topological superconductivity in a planar heterostructure[J],2021,118(27).
APA	Lesser O.,Saydjari A.,Wesson M.,Yacoby A.,&Oreg Y..(2021).Phase-induced topological superconductivity in a planar heterostructure.Proceedings of the National Academy of Sciences of the United States of America,118(27).
MLA	Lesser O.,et al."Phase-induced topological superconductivity in a planar heterostructure".Proceedings of the National Academy of Sciences of the United States of America 118.27(2021).