Artificial topological insulator realized in a two-terminal Josephson junction with Rashba spin-orbit interaction

Medic, Luka (author), Ramšak, Anton (author), Rejec, Tomaž (author)

We study a two-terminal Josephson junction with conventional superconductors and a normal region with a Rashba spin-orbit interaction, characterized by two Aharonov-Casher (AC) fluxes. When the superconducting phase difference equals π, the Andreev subgap spectrum may host zero-energy Weyl singularities associated with a vanishing normal-state reflection eigenvalue. With one of the AC fluxes playing the role of a quasimomentum, the junction can be viewed as an artificial one-dimensional chiral topological insulator. Its topological phase can be tuned by crossing a Weyl singularity by means of varying the remaining AC flux. By associating an additional component of the quasimomentum with the superconducting phase difference, an artificial Chern insulator is realized.

• Language: English
• Keywords: sondensed matter physics, superconductors
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FMF - Faculty of Mathematics and Physics
• Publication status: Published
• Publication version: Version of Record
• Year: 2025
• Number of pages: Str. 013166-1-013166-6
• Numbering: Vol. 7, iss. 1
• PID: 20.500.12556/RUL-167354
• UDC: 538.9
• ISSN on article: 2643-1564
• DOI: 10.1103/PhysRevResearch.7.013166
• COBISS.SI-ID: 226373123
• Publication date in RUL: 17.02.2025

Record is a part of a journal

• Title: Physical review research
• Publisher: American Phyisical Society
• ISSN: 2643-1564
• COBISS.SI-ID: 32822823

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Keywords: fizika kondenzirane snovi, superprevodniki

Projects

• Funder: ARIS - Slovenian Research and Innovation Agency
• Project number: P1-0044-2022
• Name: Teorija trdnih snovi in statistična fizika

• Funder: ARIS - Slovenian Research and Innovation Agency
• Project number: J2-2514-2020
• Name: Razvoj komponent za vzpostavitev nove evropske mreže za kvantno komunikacijo