Acoustoelectric pumping through a ballistic point contact in the presence of magnetic fields

Details Acoustoelectric pumping through a ballistic point contact in the presence of magnetic fields Acoustoelectric pumping through a ballistic point contact in the presence of magnetic fields

2001-04-22

arxiv.org/abs/cond-mat/0104408v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages

Scientific paper

10.1103/PhysRevB.64.195308

The acoustoelectric current, J, induced in a ballistic point contact (PC) by a surface acoustic wave is calculated in the presence of a perpendicular magnetic field, B. It is found that the dependence of the current on the Fermi energy in the terminals is strongly correlated with that of the PC conductance: J is small at the conductance plateaus, and is large at the steps. Like the conductance, the acoustoelectric current has the same functional behavior as in the absence of the field, but with renormalized energy scales, which depend on the strength of the magnetic field, | B|.

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