Fluctuational internal Josephson effect in topological insulator film
arXiv:1304.1436 · doi:10.1103/PhysRevB.88.085414
Abstract
Tunneling between opposite surfaces of topological insulator thin film populated by electrons and holes is considered. We predict considerable enhancement of tunneling conductivity by Cooper electron-hole pair fluctuations that are precursor of their Cooper pairing. Cooper pair fluctuations lead to the critical behavior of tunneling conductivity in vicinity of critical temperature with critical index ν=2. If the pairing is suppressed by disorder the behavior of tunneling conductivity in vicinity of quantum phase transition is also critical with the index μ=2. The effect can be interpreted as fluctuational internal Josephson effect and it is general phenomenon for electron-hole bilayers. The peculiarities of the effect in other realizations of electron-hole bilayer are discussed.
8 pages and 7 figures. Extended version accepted to Phys. Rev. B
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Cited by in corpus (6)
- Tunneling and Fluctuating Electron-Hole Cooper Pairs in Double Bilayer Graphene
- Anomalous Coulomb Drag in Electron-Hole Bilayers due to the Formation of Excitons
- Drag effect and Cooper electron-hole pair fluctuations in a topological insulator film
- Electromagnetic properties of a double layer graphene system with electron-hole pairing
- Longitudinal Josephson effect in systems with pairing of spatially separated electrons and holes
- Topological fluctuating electron-hole Cooper pairs in graphene-GaAs heterostructures