Fluctuational internal Josephson effect in a topological insulator film
D. K. Efimkin, Yu. E. Lozovik
DOI 10.1103/PhysRevB.88.085414 · Physical Review B
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Abstract
Tunneling between opposite surfaces of a topological insulator thin film populated by electrons and holes is considered. We predict the considerable enhancement of tunneling conductivity by Cooper electron-hole pair fluctuations that are a precursor of their Cooper pairing. Cooper pair fluctuations lead to the critical behavior of tunneling conductivity in the vicinity of critical temperature with the critical index ν=2. If the pairing is suppressed by disorder, the behavior of tunneling conductivity in the vicinity of the quantum phase transition is also critical with the index μ=2. The effect can be interpreted as the fluctuational internal Josephson effect, and it is a general phenomenon for electron-hole bilayers. The peculiarities of the effect in other realizations of an electron-hole bilayer are discussed.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Se3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.1 | Pressure not reported | unknown |
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