Supercurrent reversal in ferromagnetic hybrid nanowire Josephson junctions
(2023) In Physical Review B 107(8).- Abstract
We report supercurrent transport measurements in hybrid Josephson junctions comprising semiconducting InAs nanowires with epitaxial ferromagnetic insulator EuS and superconducting Al coatings. The wires display a hysteretic superconducting window close to the coercivity, away from zero external magnetic field. Using a multi-interferometer setup, we measure the current-phase relation of multiple magnetic junctions and find an abrupt switch between π and 0 phases within the superconducting window. We attribute the 0-π transition to the discrete flipping of the EuS domains and provide a qualitative theory showing that a sizable exchange field can polarize the junction and lead to the supercurrent reversal. Both 0 and π phases can be... (More)
We report supercurrent transport measurements in hybrid Josephson junctions comprising semiconducting InAs nanowires with epitaxial ferromagnetic insulator EuS and superconducting Al coatings. The wires display a hysteretic superconducting window close to the coercivity, away from zero external magnetic field. Using a multi-interferometer setup, we measure the current-phase relation of multiple magnetic junctions and find an abrupt switch between π and 0 phases within the superconducting window. We attribute the 0-π transition to the discrete flipping of the EuS domains and provide a qualitative theory showing that a sizable exchange field can polarize the junction and lead to the supercurrent reversal. Both 0 and π phases can be realized at zero external field by demagnetizing the wire.
(Less)
- author
- Razmadze, D.
; Souto, R. Seoane
LU
; Galletti, L. ; Maiani, A. ; Liu, Y. ; Krogstrup, P. ; Schrade, C. ; Gyenis, A. ; Marcus, C. M. and Vaitiekėnas, S.
- organization
- publishing date
- 2023-02
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review B
- volume
- 107
- issue
- 8
- article number
- L081301
- publisher
- American Physical Society
- external identifiers
-
- scopus:85148330612
- ISSN
- 2469-9950
- DOI
- 10.1103/PhysRevB.107.L081301
- language
- English
- LU publication?
- yes
- id
- 872af843-ff2f-4a76-9137-7bed842ebd47
- date added to LUP
- 2023-03-03 13:57:48
- date last changed
- 2023-11-21 16:45:32
@article{872af843-ff2f-4a76-9137-7bed842ebd47, abstract = {{<p>We report supercurrent transport measurements in hybrid Josephson junctions comprising semiconducting InAs nanowires with epitaxial ferromagnetic insulator EuS and superconducting Al coatings. The wires display a hysteretic superconducting window close to the coercivity, away from zero external magnetic field. Using a multi-interferometer setup, we measure the current-phase relation of multiple magnetic junctions and find an abrupt switch between π and 0 phases within the superconducting window. We attribute the 0-π transition to the discrete flipping of the EuS domains and provide a qualitative theory showing that a sizable exchange field can polarize the junction and lead to the supercurrent reversal. Both 0 and π phases can be realized at zero external field by demagnetizing the wire.</p>}}, author = {{Razmadze, D. and Souto, R. Seoane and Galletti, L. and Maiani, A. and Liu, Y. and Krogstrup, P. and Schrade, C. and Gyenis, A. and Marcus, C. M. and Vaitiekėnas, S.}}, issn = {{2469-9950}}, language = {{eng}}, number = {{8}}, publisher = {{American Physical Society}}, series = {{Physical Review B}}, title = {{Supercurrent reversal in ferromagnetic hybrid nanowire Josephson junctions}}, url = {{http://dx.doi.org/10.1103/PhysRevB.107.L081301}}, doi = {{10.1103/PhysRevB.107.L081301}}, volume = {{107}}, year = {{2023}}, }