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

The Meissner effect is one of the defining properties of superconductivity,with a conventional superconductor completely repelling an external magneticfield. In contrast to this diamagnetic behavior, odd-frequency superconductingpairing has often been seen to produce a paramagnetic Meissner effect, whichinstead makes the superconductor unstable due to the attraction of magneticfield. In this work we study how both even- and odd-frequency superconductingpairing contributes to the Meissner effect in a generic two-orbitalsuperconductor with a tunable odd-frequency pairing component. By dividing thecontributions to the Meissner effect into intra- and inter-band processes, wefind that the odd-frequency pairing actually generates both dia- andparamagnetic Meissner responses, determined by the normal-state band structure.More specifically, for materials with two electron-like (hole-like) low-energybands we find that the odd-frequency inter-band contribution is paramagneticbut nearly canceled by a diamagnetic odd-frequency intra-band contribution.Combined with a diamagnetic even-frequency contribution, such superconductorsthus always display a large diamagnetic Meissner response to an externalmagnetic field, even in the presence of large odd-frequency pairing. Formaterials with an inverted, or topological, band structure, we find theodd-frequency inter-band contribution to instead be diamagnetic and even thedominating contribution to the Meissner effect in the near-metallic regime.Taken together, our results show that odd-frequency pairing in multi-orbitalsuperconductors does not generate a destabilizing paramagnetic Meissner effectand can even generate a diamagnetic response in topological materials.

Dia- and paramagnetic Meissner effect from odd-frequency pairing in multi-orbital superconductors