Depinning, depopulation and crossover effects on tunnelling magnetoplasmons in lateral multiwire superlattices
G Gumbs; Danhong Huang; G Gumbs; Dept. of Phys., Lethbridge Univ., Alta., Canada; Danhong Huang; Dept. of Phys., Lethbridge Univ., Alta., Canada
Журнал:
Journal of Physics: Condensed Matter
Дата:
1992-02-10
Аннотация:
By incorporating lateral tunnelling between adjacent quantum wires as well as taking into account the dependence of the areal electron density and modulation strength on the varying gate voltage, the authors have calculated the magnetoplasmon excitation energies of a lateral multiwire superlattice. They have also examined the role played by modulation strength (i.e. barrier height) and applied magnetic field on the collective modes. Their model successfully reproduces several interesting features recently observed with the use of far infrared spectroscopy. Also, a novel commensurability relation between cyclotron and skipping orbits is predicted.
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