Evidence for spin-polarized bound states in semiconductor-superconductor-ferromagnetic-insulator islands

Research output: Contribution to journalJournal articleResearchpeer-review

30 Downloads (Pure)

Abstract

We report Coulomb blockade transport studies of semiconducting InAs nanowires grown with epitaxial superconducting Al and ferromagnetic insulator EuS on overlapping facets. Comparing experiment to a theoretical model, we associate cotunneling features in even-odd bias spectra with spin-polarized Andreev levels. Results are consistent with zero-field spin splitting exceeding the induced superconducting gap. Energies of subgap states are tunable on either side of zero via electrostatic gates.

Original languageEnglish
Article numberL041304
JournalPhysical Review B
Volume105
Issue number4
Number of pages5
ISSN2469-9950
DOIs
Publication statusPublished - 31 Jan 2022

Bibliographical note

Publisher Copyright:
© 2022 American Physical Society.

Cite this