Superconducting proximity effect in topological metals
Kyungmin Lee, Abolhassan Vaezi, Mark H. Fischer, Eun-Ah Kim
DOI 10.1103/PhysRevB.90.214510 · 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
Much interest in the superconducting proximity effect in three-dimensional (3D) topological insulators (TIs) has been driven by the potential to induce Majorana bound states at the interface. Most candidate materials for 3D TI, however, are bulk metals, with bulk states at the Fermi level coexisting with well-defined surface states exhibiting spin-momentum locking. In such topological metals, the proximity effect can differ qualitatively from that in TIs. By studying a model topological metal-superconductor (TM-SC) heterostructure within the Bogoliubov–de Gennes formalism, we show that the pair amplitude reaches the naked surface, unlike in a topological insulator-superconductor (TI-SC) heterostructure where it is confined to the interface. Furthermore, we predict vortex-bound-state spectra to contain a Majorana zero mode localized at the naked surface, separated from the bulk vortex-bound-state spectra by a finite energy gap in such a TM-SC heterostructure. These naked-surface-bound modes are amenable to experimental observation and manipulation, presenting advantages of TM-SC over TI-SC.
Similar papers
Superconducting proximity effect in three-dimensional topological insulators in the presence of a magnetic field
similarity 0.93Pablo Burset et al.
Source status unknown — claims are unverified
Unveiling in-gap states and Majorana zero modes in superconductor-topological insulator bilayer model
similarity 0.92Umesh Kumar et al.
Source status unknown — claims are unverified
Proximity-Induced Superconductivity in Epitaxial Topological Insulator/Graphene/Gallium Heterostructures
similarity 0.91Cequn Li et al. · 2022 · arXiv:2205.02806
Source status unknown — claims are unverified
Proximity effect in a heterostructure of a high superconductor with a topological insulator from Dynamical mean field theory
similarity 0.91Xiancong Lu & David Sénéchal · 2019 · arXiv:1911.11898
Source status unknown — claims are unverified
Superconducting proximity effect in topological metals
similarity 0.90Kyungmin Lee et al. · 2014 · arXiv:1402.3297
Source status unknown — claims are unverified
Superconducting proximity effect in three-dimensional topological insulators in the presence of a magnetic field
similarity 0.89Pablo Burset et al. · 2015 · arXiv:1508.07173
Source status unknown — claims are unverified