On the Small-Period Oscillation of Magnetoresistance in the Bechgaard Salts
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概要
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The effect of the Umklapp process matrix elemertts of the S[)W periodic potential isstudied on the basis of an anisotropic two-dimensional band modeling the Bechgaardsalts. The matrix elements are calculated by using one-electron eigen wave functionsobtained in the normal state in the magnetic field with due regard to the dimerizationalong the conducting *-axis. When the number of holes in the band slightly deviatesfrom the stoichiometric value due to impurities etc., Umklapp matrix elements pro-duce small gaps of order 0.03 meV apart from the bigger Landau band gaps in theenergy spectrum. These gaps pulsate reaching zero with a period close to the smallperiod observed in the phenomenon of the title. Plausible arguments are given to ex-plain to phenomenon in ternas of the Zener tunneling of current carriers throughthese pulsating small gaps.
- 社団法人日本物理学会の論文
- 1987-03-15
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