Drag effect and Cooper electron-hole pair fluctuations in a topological insulator film

Abstract

Manifestations of fluctuating Cooper pairs formed by electrons and holes populating opposite surfaces of a topological insulator film in the Coulomb drag effect are considered. Fluctuational Aslamazov-Larkin contribution to the transresistance between surfaces of the film is calculated. The contribution is the most singular one in the vicinity of critical temperature $T_{\mathrm{d}}$ and diverges in the critical manner as $(T-T_{\mathrm{d}}{)}^{-1}$. In the realistic conditions $\gamma \sim T_{\mathrm{d}}$, where $\gamma$ is average scattering rate of electrons and holes, Aslamazov-Larkin contribution plays important role and can dominate the fluctuation transport. The macroscopic theory based on time-dependent Ginzburg-Landau equation is developed for description of the fluctuational drag effect in the system. The results can be easily generalized for other realizations of electron-hole bilayer.

7 pages, 2 figure. Extended version accepted to Physical Review B

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Cited by in corpus (10)

• Coulomb drag
• Tunneling and Fluctuating Electron-Hole Cooper Pairs in Double Bilayer Graphene
• Roton-maxon spectrum and instability for weakly interacting dipolar excitons in a semiconductor layer
• Anomalous Coulomb Drag in Electron-Hole Bilayers due to the Formation of Excitons
• Anomalous Hall Coulomb drag of massive Dirac fermions
• Optical probing in a bilayer dark-bright condensate system
• Coulomb drag in topological materials
• Performance of the T-matrix based master equation for Coulomb drag in double quantum dots
• Topological fluctuating electron-hole Cooper pairs in graphene-GaAs heterostructures
• Anomalous drag in electron-hole condensates with granulated order