Surface acoustic wave induced magnetoresistance oscillations in a 2D electron gas

Details Surface acoustic wave induced magnetoresistance oscillations in a 2D electron gas Surface acoustic wave induced magnetoresistance oscillations in a 2D electron gas

2003-12-25

arxiv.org/abs/cond-mat/0312640v1

Phys. Rev. Lett. 93, 036804 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages with 1 figure

Scientific paper

10.1103/PhysRevLett.93.036804

We study the geometrical commensurability oscillations imposed onto the resistivity of 2D electrons in a perpendicular magnetic field by a propagating surface acoustic wave (SAW). We show that, for $\omega <\omega_{c}$, this effect is composed of an anisotropic dynamical classical contribution increasing the resistivity and the non-equilibrium quantum contribution isotropically decreasing resistivity, and we predict the appearance of zero-resistance states associated with geometrical commensurability at large SAW amplitude. We also describe how the commensurability oscillations modulate the resonances in the SAW-induced resistivity at multiples of the cyclotron frequency.

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