Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2004-06-27
Phys. Rev. B 71, 081303(R) (2005)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
REVTeX4, 5 pages, 5 figures
Scientific paper
10.1103/PhysRevB.71.081303
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.
Endo Akira
Iye Yasuhiro
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