Formation and detection of Majorana modes in quantum spin Hall trenches

Autor:	Fleckenstein, C., Ziani, N. Traverso, Calzona, A., Sassetti, M., Trauzettel, B.
Rok vydání:	2020
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Superconductivity
Zdroj:	Phys. Rev. B 103, 125303 (2021)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.103.125303
Popis:	We propose a novel realization for a topologically superconducting phase hosting Majorana zero-modes on the basis of quantum spin Hall systems. Remarkably, our proposal is completely free of ferromagnets. Instead, we confine helical edge states around a narrow defect line of finite length in a two-dimensional topological insulator. We demonstrate the formation of a new topological regime, hosting protected Majorana modes in the presence of s-wave superconductivity and Zeeman coupling. Interestingly, when the system is weakly tunnel-coupled to helical edge state reservoirs, a particular transport signature is associated with the presence of a non-Abelian Majorana zero-mode. Comment: 8 pages, 7 figures + Supp. Mat
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2001.03475 Zobrazit plný text záznamu View this record from Arxiv