Majorana bound states in d-wave superconductor planar Josephson junction

We study phase-controlled planar Josephson junctions comprising a two-dimensional electron gas with strong spin-orbit coupling and d-wave superconductors, which have an advantage of high critical temperature. We show that a region between the two superconductors can be tuned into a topological state...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2023-11
Main Authors: Vakili, Hamed, Moaz Ali, Elekhtiar, Mohamed, Kovalev, Alexey A
Format: Article
Language:English
Subjects:
Bilayers
Chemical potential
Copper oxides
Critical temperature
Electron gas
Electron spin
Heterostructures
Josephson junctions
Phase diagrams
Spin-orbit interactions
Superconductors
Topology
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We study phase-controlled planar Josephson junctions comprising a two-dimensional electron gas with strong spin-orbit coupling and d-wave superconductors, which have an advantage of high critical temperature. We show that a region between the two superconductors can be tuned into a topological state by the in-plane Zeeman field, and can host Majorana bound states. The phase diagram as a function of the Zeeman field, chemical potential, and the phase difference between superconductors exhibits the appearance of Majorana bound states for a wide range of parameters. We further investigate the behavior of the topological gap and its dependence on the type of d-wave pairing, i.e., d, d+is, or d+id', and note the difficulties that can arise due to the presence of gapless excitations in pure d-wave superconductors. On the other hand, the planar Josephson junctions based on superconductors with d+is and d+id' pairings can potentially lead to realizations of Majorana bound states. Our proposal can be realized in cuprate superconductors, e.g., in a twisted bilayer, combined with the layered semiconductor Bi2O2Se.
ISSN:2331-8422
DOI:10.48550/arxiv.2307.15162