| Title: |
Three-phase Majorana zero modes at tiny magnetic fields |
| Authors: |
Lesser, Omri; Flensberg, Karsten; Oppen, Felix von; Oreg, Yuval |
| Publication Year: |
2021 |
| Collection: |
FU Berlin: Refubium |
| Subject Terms: |
Geometric & topological phases; Majorana fermions; Topological materials; Topological superconductors; p-wave; ddc:539 |
| Description: |
Proposals for realizing Majorana fermions in condensed-matter systems typically rely on magnetic fields, which degrade the proximitizing superconductor and plague the Majoranas' detection. We propose an alternative scheme to realize Majoranas based only on phase-biased superconductors. The phases (at least three of them) can be biased by a tiny magnetic field threading macroscopic superconducting loops, focusing and enhancing the effect of the magnetic field onto the junction, or by supercurrents. We show how a combination of the superconducting phase winding and the spin-orbit phase induced in closed loops (Aharonov-Casher effect) facilitates a topological superconducting state with Majorana end states. We demonstrate this scheme with an analytically tractable model as well as simulations of realistic setups comprising only conventional materials. |
| Document Type: |
article in journal/newspaper |
| File Description: |
10 Seiten (Manuskriptversion); application/pdf |
| Language: |
English |
| Relation: |
84553 |
| DOI: |
10.17169/refubium-33833 |
| DOI: |
10.1103/PhysRevB.103.L121116 |
| Availability: |
https://refubium.fu-berlin.de/handle/fub188/34115; https://doi.org/10.17169/refubium-33833; https://doi.org/10.1103/PhysRevB.103.L121116 |
| Rights: |
http://www.fu-berlin.de/sites/refubium/rechtliches/Nutzungsbedingungen |
| Accession Number: |
edsbas.D950EB9A |
| Database: |
BASE |