Oscillatory Magneto-Thermopower and Resonant Phonon Drag in a High-Mobility 2D Electron Gas

Abstract

Experimental and theoretical evidence is presented for new low-magnetic-field ($B<5$ kG) 1/B-oscillations in the thermoelectric power of a high-mobility GaAs/AlGaAs two-dimensional (2D) electron gas. The oscillations result from inter-Landau-Level resonances of acoustic phonons carrying a momentum equal to twice the Fermi wavenumber at $B=0$. Numerical calculations show that both 3D and 2D phonons can contribute to this effect.

4 pages, 5 figures

References in corpus (3)

• Zener Tunneling Between Landau Orbits in a High-Mobility Two-Dimensional Electron Gas
• A New Class of Magnetoresistance Oscillations: Interaction of a Two-Dimensional Electron Gas with Leaky Interface Phonons
• Leaky interface phonons in AlGaAs/GaAs structures

Cited by in corpus (12)

• Nonequilibrium phenomena in high Landau levels
• Resonant Phonon Scattering in Quantum Hall Systems Driven by dc Electric Fields
• Magnetoresistance Oscillations in Two-dimensional Electron Systems Induced by AC and DC Fields
• Thermopower as a Possible Probe of Non-Abelian Quasiparticle Statistics in Fractional Quantum Hall Liquids
• Microwave photoresistance of a high-mobility two-dimensional electron gas in a triangular antidot lattice
• Thermopower of Quantum Hall States in Corbino Geometry as a Measure of Quasiparticle Entropy
• Low temperature electron-phonon resonance in dc-current-biased two-dimensional electron systems
• Microwave-induced magnetooscillations and signatures of zero-resistance states in phonon-drag voltage in two-dimensional electron systems
• Transport equation for 2D electron liquid under microwave radiation plus magnetic field and the Zero Resistance State
• Microwave-induced magnetoresistance of two-dimensional electrons interacting with acoustic phonons
• Magnetocapacitance oscillations and thermoelectric effect in two-dimensional electron gas irradiated by microwaves
• Magnetophonon oscillations of thermoelectric power and combined resonance in two-subband electron systems