Phase-tunable second-order topological superconductor
S. Franca, D. V. Efremov, I. C. Fulga
DOI 10.1103/PhysRevB.100.075415 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Two-dimensional second-order topological superconductors (SOTSCs) have gapped bulk and edge states, with zero-energy Majorana bound states localized at corners. Motivated by recent advances in Majorana nanowire experiments, we propose to realize a tunable SOTSC as a two-dimensional nanowire array. We show that the coupling between the Majorana modes of adjacent wires can be controlled by phase-biasing the device, allowing one to access a variety of topological phases. We characterize the system using scattering theory, which provides access to its transport properties and its topological invariants. The setup is robust against disorder, both in the nanowires themselves and in the Josephson junctions formed between adjacent wires. Further, we identify a parameter regime in which an initially trivial system is rendered topological upon adding disorder, providing an example of a second-order topological Anderson phase.
Similar papers
Crystalline Anisotropic Topological Superconductivity in Planar Josephson Junctions
similarity 0.91Joseph D. Pakizer et al. · 2020 · arXiv:2007.03498
Source status unknown — claims are unverified
Intrinsic second-order topological superconductors with tunable Majorana zero modes
similarity 0.91Xiao-Jiao Wang et al.
Source status unknown — claims are unverified
Robust Transport Signatures of Topological Superconductivity in Topological Insulator Nanowires
similarity 0.90Fernando de Juan et al. · 2014 · arXiv:1401.5832
Source status unknown — claims are unverified
Josephson junction arrays as a platform for topological phases of matter
similarity 0.90Omri Lesser et al.
Source status unknown — claims are unverified
Topological superconductivity in a magnetic-texture coupled Josephson junction
similarity 0.90Ignacio Sardinero et al.
Source status unknown — claims are unverified
Tunable Planar Josephson Junctions Driven by Time-Dependent Spin-Orbit Coupling
similarity 0.89David Monroe et al.
Source status unknown — claims are unverified