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 the critical temperature of multi-gap superconducting3D heterostructures at atomic limit (HAL) made of a superlattice of atomiclayers with an electron spectrum made of several quantum subbands can beamplified by a shape resonance driven by the contact exchange interactionbetween different gaps. The $T_C$ amplification is achieved tuning the Fermilevel near the singular nodal point at a Lifshitz transition for opening aneck. Recently high interest has been addressed to the breaking of inversionsymmetry which leads to a linear-in-momentum spin-orbit induced spin splitting,universally referred to as Rashba spin-orbit coupling (RSOC) also in 3D layeredmetals. However the physics of multi-gap superconductivity near unconventionalLifshitz transitions in 3D HAL with RSOC, being in a non-BCS regime, is notknown. The key result of this work getting the superconducting gaps byBogoliubov theory and the 3D electron wave functions by solution of the Diracequation is the feasibility of tuning multi-gap superconductivity by suitablymatching the spin-orbit length with the 3D superlattice period. It is foundthat the presence of the RSOC amplifies both the k dependent anisotropic gapfunction and the critical temperature when the Fermi energy is tuned near thecircular nodal line. Our results suggest a method to effectively vary theeffect of RSOC on macroscopic superconductor condensates via the tuning of thesuperlattice modulation parameter in a way potentially relevant for spintronicsfunctionalities in several existing experimental platforms and tunablematerials needed for quantum devices for quantum computing.

Multigaps superconductivity at unconventional Lifshitz transition in a 3D Rashba heterostructure at atomic limit