Junctionless Cooper pair transistor
arXiv:1602.07930 · doi:10.1016/j.physc.2016.02.010
Abstract
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 were 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.
6 pages, 3 figures
References in corpus (5)
- Coulomb blockade and Bloch oscillations in superconducting Ti nanowires
- Quantum phase slip phenomenon in ultra-narrow superconducting nanorings
- Spatially-resolved probing of a non-equilibrium superconductor
- Negative magnetoresistance of ultra-narrow superconducting nanowires in the resistive state
- The quantum phase slip phenomenon in superconducting nanowires with high-impedance environment
Cited by in corpus (5)
- Cooper-pair transistor as a minimal topological quantum circuit
- Superconducting MoSi nanowires
- Superconducting insulators and localization of Cooper pairs
- Microscopic charged fluctuators as a limit to the coherence of disordered superconductor devices
- Synchronization of Bloch oscillations by gate voltage modulation