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Dimensions Effects in Insulating NbTin Disordered Films and Asymptotic Freedom of Cooper Pairs
- Publication Year :
- 2019
-
Abstract
- We investigate the evolution of the electronic transport in disordered NbTiN films at the insulating side of the superconductor-insulator transition as function of the effective system size along the current direction. We demonstrate that both, the threshold voltage characterizing low-temperature superinsulating phase, and the Berezinskii-Kosterlitz-Thouless criticality of the conductance above the superinsulator critical temperature, vanish upon increasing disorder taking the system far from the disorder-driven superconductor-insulator transition. We find that decrease in the system’s effective size suppresses its insulating and superinsulating properties and that threshold voltage drops linearly with the diminishing system size. We demonstrate that this linear dependence can be used for experimental measurement of the linear tension of the electric string binding Cooper pairs and anti-Cooper pairs in a superinsulator.
- Subjects :
- Condensed Matter::Quantum Gases
Superinsulator
Physics
Physics and Astronomy (miscellaneous)
Solid-state physics
Condensed matter physics
superinsulation,confinement,asymptotic freedom in condensed matter
Conductance
01 natural sciences
String (physics)
Asymptotic freedom
010305 fluids & plasmas
Threshold voltage
Condensed Matter::Superconductivity
Phase (matter)
confinement
asymptotic freedom in condensed matter
0103 physical sciences
Cooper pair
010306 general physics
superinsulation
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....95f14a7b31c202b4082095e81bfb1c5b