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New class of small amplitude low-field magnetoresistance oscillation in unidirectional lateral superlattice: Geometric resonance of Bragg-reflected cyclotron orbit

Akira Endo·Yasuhiro Iye
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Abstract

We have uncovered a new class of small amplitude magnetoresistance oscillation in unidirectional lateral superlattice (ULSL). The oscillation is observed in a low-field regime, typically |B| =< 0.03 T, as small undulation on top of well-known positive magnetoresistance background. Positions of maxima of the oscillation shift to lower field side with the increase of the electron concentration n_e roughly proportionally to n_e^{-1/2}, and also with the increase of period a of ULSL samples. The oscillation is attributed to commensurability between the period a and the width of open orbits originating from the miniband structure.

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Akira Endo, Yasuhiro Iye. 2004-06-27. New class of small amplitude low-field magnetoresistance oscillation in unidirectional lateral superlattice: Geometric resonance of Bragg-reflected cyclotron orbit. https://doi.org/10.1103/physrevb.71.081303

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