title: Oscillatory magnetothermopower 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 wave number at B=0. Numerical calculations show that both 3D and 2D phonons can contribute to this effect.
authors.affiliation: Department of Physics, University of Utah, Salt Lake City, Utah 84112, USA.
authors.forename: Jian
authors.initials: J
authors.lastname: Zhang
authors.forename: S K
authors.initials: SK
authors.lastname: Lyo
authors.forename: R R
authors.initials: RR
authors.lastname: Du
authors.forename: J A
authors.initials: JA
authors.lastname: Simmons
authors.forename: J L
authors.initials: JL
authors.lastname: Reno