Article,
Supercurrent transport through 1e-periodic full-shell Coulomb islands
Contributors
Razmadze, Davydas
0000-0002-1645-5179
[1]
Souto, Rubén Seoane
0000-0002-2978-3534
[1]
[2]
[3]
O'Farrell, Eoin C T
0000-0003-2216-8958
[1]
Krogstrup, Peter
0000-0002-1930-8553
[1]
Leijnse, Martin
0000-0003-3639-8594
[1]
[3]
Marcus, Charles Masamed
0000-0003-2420-4692
[1]
Vaitiekėnas, Saulius
0000-0002-5007-461X
[1]
Affiliations
- [1] University of Copenhagen [NORA names: KU University of Copenhagen; University; Denmark; Europe, EU; Nordic; OECD];
- [2] Instituto de Ciencia de Materiales de Madrid [NORA names: Spain; Europe, EU; OECD];
- [3] Lund University [NORA names: Sweden; Europe, EU; Nordic; OECD]
Abstract
We experimentally investigate supercurrent through Coulomb islands, where island and leads are fabricated from semiconducting nanowires with fully surrounding superconducting shells. Applying flux along the wire yields a series of destructive Little-Parks lobes with reentrant supercurrent. We find Coulomb blockade with 2e peak spacing in the zeroth lobe and 1e average spacing, with regions of significant even-odd modulation, in the first lobe. Evolution of Coulomb-peak amplitude through the first lobe is consistent with a theoretical model of supercurrent carried predominantly by zero-energy states in the leads and the island.
Keywords
Coulomb,
Coulomb blockade,
Coulomb island,
amplitude,
average spacing,
blockade,
evolution,
experimentation,
flux,
islands,
lobe,
modulation,
nanowires,
region,
semiconducting nanowires,
shell,
space,
state,
superconducting shell,
supercurrent,
supercurrent transport,
theoretical model,
transport,
wire,
zero-energy states
