Weak and Strong Localization in Three-Dimensional Granular Bismuth Films

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概要

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• For various kinds of thick granular Bi films, conductivity and magnetoresistance(MR) have been measured at low temperatures down to 0.05 K in magneticfields up to 84 k0e. Corresponding to the degree of disorder in a sample, sys-tematic results have been obtained at low temperatures. For samples of lowresistivity, conductivity with T"' dependence and anomalous positive MR appear.These are well explained by the three-dimensional weak Iocalization theory takingaccount of spin-orbit interaction. The inelastic scattering time shows T "'dependence. For samples of high resistivity, large change of conductivity with log Tdependence and large positive MR with log II dependence are observed. Forthe sample of the highest resistivity, the conductivity changes more rapidlythan log T. The MR is positive and rather large. This saturates and slightlydecreases in high magnetic fields at very low temperatures.

• 社団法人日本物理学会の論文
• 1985-08-15

著者

• Okamura Makoto

  Research Institute For Applied Mechanics Kyushu University

• FUKASE Tetsuo

  The Research Institute for Iron,Steel and Other Metals,Tohoku University

• Koike Yoji

  The Research Institute For Iron Steel And Other Metals Tohoku University

• Fukase Tetsuro

  Institute For Materials Research Tohoku University

• Fukase Tetsuo

  The Research Institute For Iron Steel And Other Metals

• Fukase Tetsuo

  Institute For Materials Reserch Tohoku University

• Funase Tetsuo

  Institute For Material Research Tohoku University

• Fukase T

  Institute For Materials Research Tohoku University

• OKAMURA Masami

  The Research Institute for Iron,Steel and Other Metals,Tohoku University

• Okamura M

  Osaka Dental Univ. Osaka Jpn

• Fukase Tetsuo

  Institute for Materials Research, Tohoku University

• Okamura Masami

  The Research Institute for Iron,Steel and Other Metals,Tohoku University:Toshiba Corporation

• OKAMURA Makoto

  Research Institute for Applied Mechanics, Kyushu University

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