Coulomb drag in topological insulator films

Abstract

We study Coulomb drag between the top and bottom surfaces of topological insulator films. We derive a kinetic equation for the thin-film spin density matrix containing the full spin structure of the two-layer system, and analyze the electron-electron interaction in detail in order to recover all terms responsible for Coulomb drag. Focusing on typical topological insulator systems, with film thicknesses d up to 6 nm, we obtain numerical and approximate analytical results for the drag resistivity ${\rho }_{\text{D}}$ and find that ${\rho }_{\text{D}}$ is proportional to $T^2{d}^{-4}{n}_{\text{a}}^{-3/2}{n}_{\text{p}}^{-3/2}$ at low temperature T and low electron density $n_{\text{a,p}}$, with a denoting the active layer and p the passive layer. In addition, we compare ${\rho }_{\text{D}}$ with graphene, identifying qualitative and quantitative differences, and we discuss the multi valley case, ultra thin films and electron-hole layers.

References in corpus (29)

• Non-Abelian Anyons and Topological Quantum Computation
• Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator
• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• A topological Dirac insulator in a quantum spin Hall phase : Experimental observation of first strong topological insulator
• Quantized Anomalous Hall Effect in Magnetic Topological Insulators
• First direct observation of Spin-textures in Topological Insulators : Spin-resolved ARPES as a probe of topological quantum spin Hall effect and Berry's phase
• Impurity effect on weak anti-localization in the topological insulator Bi2Te3
• The development of ferromagnetism in the doped topological insulator Bi2-xMnxTe3
• Strong Coulomb drag and broken symmetry in double-layer graphene
• Observation of Dirac Holes and Electrons in a Topological Insulator
• Ultrafast helicity control of surface currents in topological insulators with near-unity fidelity
• Tuning bulk and surface conduction in topological Kondo insulator SmB6
• Spin-helical transport in normal and superconducting topological insulators
• Intrinsic Electron-Phonon Resistivity in Bi2Se3 in the Topological Regime
• Coulomb Drag in Graphene
• Mott Physics on Helical Edges of 2D Topological Insulators
• Ambipolar Surface State Thermoelectric Power of Topological Insulator Bi2Se3
• Coulomb Drag and Magnetotransport in Graphene Double Layers
• Coulomb drag in graphene single layers separated by a thin spacer
• Fingerprints of Inelastic Transport at the Surface of the Topological Insulator Bi2Se3: Role of Electron-Phonon Coupling
• Theory of Coulomb drag for massless Dirac fermions
• Disentangling the magnetoelectric and thermoelectric transport in topological insulator thin films
• Anomalous Hall response of topological insulators
• Coulomb Drag and Spin Coulomb Drag in the presence of Spin-orbit Coupling
• Two-dimensional electronic transport on the surface of 3D topological insulators
• Hot-carrier transport and spin relaxation on the surface of topological insulator
• Thickness and growth-condition dependence of \emph{in-situ} mobility and carrier density of epitaxial thin-film Bi${}_2$Se${}_3$
• Low temperature thermal transport at the interface of a topological insulator and a d-wave superconductor
• Time-reversal-protected single-Dirac-cone topological-insulator states in Bi2Te3 and Sb2Te3: Topologically Spin-polarized Dirac fermions with pi Berry's Phase

Cited by in corpus (8)

• Coulomb drag
• Inter-band Coherence Response to Electric Fields in Crystals
• Weak Localization and Antilocalization in Topological Materials with Impurity Spin-Orbit Interactions
• Quantum Transport in Weyl Semimetal Thin Films in the Presence of Spin-Orbit Coupled Impurities
• Anomalous Hall Coulomb drag of massive Dirac fermions
• Coulomb drag in topological materials
• Performance of the T-matrix based master equation for Coulomb drag in double quantum dots
• Dynamical density response and collective modes of topological insulator ultra-thin films