English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

It is well known that non-Abelian Majorana zero modes (MZM) harbor at vortexcores in a $p_{x}+\text{i}p_{y}$ topological superconductor, which can berealized in a 2D spin-orbit coupled system with a single Fermi surface and byproximity coupling to an $s$-wave superconductor. Here we show that existenceof non-Abelian MZMs is unrelated to the bulk topology of a 2D superconductor,and propose that such exotic modes can be resulted in much broader range ofsuperconductors, being topological or trivial. For a generic 2D system withmultiple Fermi surfaces and gapped out by superconducting pairings, we showthat at least a single MZM survives if there are only odd number of Fermisurfaces of which the corresponding superconducting orders have vortices, andsuch MZM is protected by an emergent Chern-Simons invariant, irrespective ofthe bulk topology of the superconductor. This result may enrich newexperimental schemes for realizing non-Aelian MZMs. In particular, we propose aminimal scheme to realize the MZMs in a 2D superconducting Dirac semimetal withtrivial bulk topology, which can be well achieved based on the recent cold atomexperiments.

A generic theory for Majorana zero modes in 2D superconductors