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The phonon-induced drag of charge carriers in heterostructures in weak magnetic fields

The kinetic description of the response of two-dimensional gases of carriers in a weak magnetic field to pulsed beams of bulk long-wavelength acoustic phonons is presented. It is assumed that a surface element with radius vector r filled with this gas has an elongated form characterized by the unit vector . The component of the time-integrated current density is calculated. This quantity depends on a time characterizing the elastic scattering of carriers by defects and on the cyclotron frequency via dimensionless parameter . Using the obtained formula for the component of time-integrated current density, we calculate suitable response patterns and compare them with results of our experiments for a gas of holes.