费米级振荡对单碲镉汞量子阱中舒布尼科夫-德哈斯振荡和磁带间振荡的贡献

IF 1.4 4区 物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY
G. M. Minkov, O. E. Rut, A. A. Sherstobitov, A. V. Germanenko, S. A. Dvoretski, N. N. Mikhailov
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引用次数: 0

摘要

实验研究了宽度为 10-18 纳米的单碲镉汞量子阱结构中磁电阻的舒布尼科夫-德哈斯振荡和磁中子带振荡。这些阵列中的导带谱因自旋轨道相互作用而分裂。这导致了舒布尼科夫-德-哈斯振荡的节拍,并产生了低频磁中子带振荡。舒布尼科夫-德-哈斯振荡的反节点和磁内频带振荡的峰值的相互位置不同寻常:在低磁场时,它们与理论预测相反。在舒布尼科夫-德-哈斯振荡的相对振幅超过 0.2-0.3 的高磁场中进行的测量显示,舒布尼科夫-德-哈斯振荡的反节点和低频振荡峰的相互位置发生了变化。数值计算和在不同温度下的额外测量表明,观察到的效应是由于磁场诱导的费米级振荡造成的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Contribution of Oscillations of the Fermi Level to the Shubnikov–de Haas and Magneto-Intersubband Oscillations in Single HgTe Quantum Wells

Contribution of Oscillations of the Fermi Level to the Shubnikov–de Haas and Magneto-Intersubband Oscillations in Single HgTe Quantum Wells

Shubnikov–de Haas oscillations and magneto-intersubband oscillations of the magnetoresistance in structures with single HgTe quantum wells with a width of 10−18 nm have been experimentally investigated. The conduction band spectrum in these arrays is split by the spin–orbit interaction. This leads to beats in the Shubnikov−de Haas oscillations and gives rise to low-frequency magneto-intersubband oscillations. The mutual positions of the antinodes of the Shubnikov−de Haas oscillations and the peaks in the magneto-intersubband oscillations are unusual: at low magnetic fields, they are opposite to theoretical predictions. The measurements in high magnetic fields, at which the relative amplitude of Shubnikov–de Haas oscillations exceeds 0.2–0.3, show a change in the mutual positions of the antinodes of the Shubnikov–de Haas oscillations and the peaks in low-frequency oscillations. Numerical calculations and additional measurements at different temperatures suggest that the observed effects are due to magnetic-field-induced oscillations of the Fermi level.

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来源期刊
JETP Letters
JETP Letters 物理-物理:综合
CiteScore
2.40
自引率
30.80%
发文量
164
审稿时长
3-6 weeks
期刊介绍: All topics of experimental and theoretical physics including gravitation, field theory, elementary particles and nuclei, plasma, nonlinear phenomena, condensed matter, superconductivity, superfluidity, lasers, and surfaces.
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