Coulomb drag in intermediate magnetic fields

Abstract

We investigated theoretically the Coulomb drag effect in coupled 2D electron gases in a wide interval of magnetic field and temperature $1/\tau \ll {\omega }_c\ll E_F/\hslash$, $T\ll E_F$, $\tau$ being intralayer scattering time, ${\omega }_c$ being the cyclotron frequency. We show that the quantization of the electron spectrum leads to rich parametric dependences of drag transresistance on temperature and magnetic field. This is in contrast to usual resistance. New small energy scales are found to cut typical excitation energies to values lower than temperature. This may lead to a linear temperature dependence of transresistance even in a relatively weak magnetic field and can explain some recent experimental data. We present a novel mechanism of Coulomb drag when the current in the active layer causes a magnetoplasmon wind and the magnetoplasmons are absorbed by the electrons of the passive layer providing a momentum transfer. We derived general relations that describe the drag as a result of resonant tunneling of magnetoplasmons.

ZIP archive,10 pages, 3 ps figures, submitted to PRB

References in corpus (8)

• Coulomb drag between two-dimensional electron systems
• Coulomb drag between disordered two-dimensional electron gas layers
• Coulomb Drag in Normal Metals and Superconductors: Diagrammatic Approach
• Two - Dimensional Electron Liquid in a Weak Magnetic Field
• Coulomb Drag as a Probe of Coupled Plasmon Modes in Parallel Quantum Wells
• Frictional drag between quantum wells mediated by phonon exchange
• Magneto-Coulomb drag: interplay of electron--electron interactions and Landau quantization
• Frictional Coulomb drag in strong magnetic fields

Cited by in corpus (10)

• Theory of microwave-induced oscillations in the magnetoconductivity of a 2D electron gas
• Coulomb drag
• Coulomb drag in high Landau levels
• Magnetodrag in hydrodynamic regime: effects of magnetoplasmon resonance and Hall viscosity
• Coulomb Drag for Strongly Localized Electrons: Pumping Mechanism
• Effective Drag Between Strongly Inhomogeneous Layers: Exact Results and Applications
• Magneto-Coulomb Drag and Hall Drag in Double-Layer Dirac Systems
• Frictional magnetodrag between spatially separated two-dimensional electron systems: Coulomb versus phonon mediated electron-electron interaction
• The physical picture behind the oscillating sign of drag in high Landau levels
• Intra-Landau-level collective excitations in a bilayer disordered electronic system