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Quantum oscillations of resistance and magnetization in magnetic semiconductors and semimetals

机译:磁性半导体和半金属中电阻和磁化的量子振荡

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摘要

Typically, Landau oscillations due to the .electron orbit quantization in magnetic field give rise to oscillations, periodic in 1/H, of the thermodynamic and kinetic characteristics of degenerate Fermi systems. Anomalous quantum oscillations are possible when the temperature and magnetic-field dependences of the chemical potential μ differ from the standard Fermi-liquid dependences, on account, e.g., of the effects of strong electron correlations. In this paper we present the experimental results on oscillations^ weakly-periodic and aperiodic in 1/H, of resistance and magnetization in single crystals of a degenerate ferromagnetic n-type semiconductor HgCr_2Se_4.
机译:通常,由于磁场中的电子轨道量化而引起的Landau振荡会引起简并费米系统的热力学和动力学特性的振荡,周期为1 / H。当化学势μ的温度和磁场相关性与标准费米液体相关性不同时,例如由于强电子相关性的影响,可能会出现异常的量子振荡。在本文中,我们给出了简并铁磁n型半导体HgCr_2Se_4单晶在1 / H内的振荡,弱周期和非周期振荡,电阻和磁化强度的实验结果。

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