Loading…
Junctionless Cooper pair transistor
•Junctionless Cooper pair box.•Quantum phase slips.•Coulomb blockade and gate modulation of the Coulomb gap. Quantum phase slip (QPS) is the topological singularity of the complex order parameter of a quasi-one-dimensional superconductor: momentary zeroing of the modulus and simultaneous 'slip&...
Saved in:
Published in: | Physica. C, Superconductivity Superconductivity, 2017-02, Vol.533, p.158-160 |
---|---|
Main Authors: | , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Summary: | •Junctionless Cooper pair box.•Quantum phase slips.•Coulomb blockade and gate modulation of the Coulomb gap.
Quantum phase slip (QPS) is the topological singularity of the complex order parameter of a quasi-one-dimensional superconductor: momentary zeroing of the modulus and simultaneous 'slip' of the phase by ±2π. The QPS event(s) are the dynamic equivalent of tunneling through a conventional Josephson junction containing static in space and time weak link(s). Here we demonstrate the operation of a superconducting single electron transistor (Cooper pair transistor) without any tunnel junctions. Instead a pair of thin superconducting titanium wires in QPS regime was used. The current–voltage characteristics demonstrate the clear Coulomb blockade with magnitude of the Coulomb gap modulated by the gate potential. The Coulomb blockade disappears above the critical temperature, and at low temperatures can be suppressed by strong magnetic field. |
---|---|
ISSN: | 0921-4534 1873-2143 |
DOI: | 10.1016/j.physc.2016.02.010 |