TY - JOUR
T1 - Commensurability oscillations by runaway and pinned electrons
AU - Tsukagoshi, K.
AU - Nagao, T.
AU - Haraguchi, M.
AU - Takaoka, S.
AU - Murase, K.
AU - Gamo, K.
N1 - Funding Information:
Acknowledgements—The authors acknowledge valuable discussions with T. Ando and the members of Ando Laboratory of the University of Tokyo. We also thank H. Okada of Sumitomo Electric Industry Co., Ltd. for providing high quality GaAs/AlGaAs heterostructures. One of the authors (KT) wishes to thank JSPS Research Fellowships for financial support. This work was supported, in part, by a Grant-in-Aid for Scientific Research in the Priority Area, ‘Quantum Coherent Electrons’, from the Ministry of Education, Science and Culture.
PY - 1998
Y1 - 1998
N2 - We report on an investigation of commensurability oscillations in antidot square-lattices, and show that the commensurate peaks in resistivity ρxx derive from two kinds of el ectron: runaway and quasi pinned electrons. The runaway electrons, which skip away along the antidot arrays, increase the value of conductivity σxx; and the quasi pinned electrons, which orbit some antidots for a long time, decrease the value of σxx. Therefore, by competition between the two different types of electron, the conductivity σxx is determined. The conductivity σyx in the antidot lattice always hasdips at the peaks in ρxx. Asa result, by combining the of values of σxx and σyx, the resistivity is determined through the orthodox relation of ρxx = σxx/(σxx2 + σyx2).
AB - We report on an investigation of commensurability oscillations in antidot square-lattices, and show that the commensurate peaks in resistivity ρxx derive from two kinds of el ectron: runaway and quasi pinned electrons. The runaway electrons, which skip away along the antidot arrays, increase the value of conductivity σxx; and the quasi pinned electrons, which orbit some antidots for a long time, decrease the value of σxx. Therefore, by competition between the two different types of electron, the conductivity σxx is determined. The conductivity σyx in the antidot lattice always hasdips at the peaks in ρxx. Asa result, by combining the of values of σxx and σyx, the resistivity is determined through the orthodox relation of ρxx = σxx/(σxx2 + σyx2).
KW - GaAs/AlGaAs
KW - Magnetoresistivity
KW - Periodic potential
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U2 - 10.1006/spmi.1996.0349
DO - 10.1006/spmi.1996.0349
M3 - Article
AN - SCOPUS:0031702987
VL - 23
SP - 493
EP - 497
JO - Superlattices and Microstructures
JF - Superlattices and Microstructures
SN - 0749-6036
IS - 2
ER -