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Quantitative mobility spectrum analysis for magnetic field dependent hall and resistivity data

  • US 5,789,931 A
  • Filed: 10/04/1995
  • Issued: 08/04/1998
  • Est. Priority Date: 10/04/1995
  • Status: Expired due to Term
First Claim
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1. A method comprising:

  • providing an isotropic sample of semiconductor material;

    sequentially exposing said sample to a plurality I of preselected magnetic fields Bi, i=1, 2, . . . , I; and

    for each said Bi ;

    (a) measuring the Hall coefficient RH(i) and electrical resistivity ρ

    i corresponding to said Bi ;

    (b) using said RH(i), said ρ

    i, and said Bi to determine elements σ

    xx(i) and σ

    xy(i) of the conductivity tensor of said sample at said Bi,(c) using said σ

    xx(i) and σ

    xy(i) to make estimates of the magnitudes Sxx(i) and Sxy(i) of the conductivity-mobility spectrum of said sample;

    wherein said method further comprises;

    using said Bi '"'"'s, said σ

    xx(i) '"'"'s and σ

    xy(i) '"'"'s, and said estimates of Sxx(i) and Sxy(i) for mathematically iterating the values of Sxx(i) and Sxy(i) ;

    wherein said iterating is done effective to cause, upon any value of said Sxx(i) becoming negative, to reset said Sxx(i) to a preselected non-negative value.

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