Spin mixing between subbands and extraordinary Landau-level shift in wide HgTe quantum wells

被引：1
作者：
Dobretsova, A. A. [1 ,2 ]
Chepelianskii, A. D. [3 ]
Mikhailov, N. N. [1 ,2 ]
Kvon, Z. D. [1 ,2 ]
机构：
[1] Rzhanov Inst Semicond Phys, Novosibirsk 630090, Russia
[2] Novosibirsk State Univ, Phys Dept, Novosibirsk 630090, Russia
[3] Univ Paris Sud, CNRS, LPS, UMR 8502, F-91405 Orsay, France
来源：
PHYSICAL REVIEW B | 2018年 / 98卷 / 15期
基金：
俄罗斯科学基金会;
关键词：
2-DIMENSIONAL SEMIMETAL; MAGNETIC-SUSCEPTIBILITY; CYCLOTRON-RESONANCE; PHASE; INSULATOR; SCATTERING; SPECTRUM; STATE;
D O I：
10.1103/PhysRevB.98.155310
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We present both the experimental and theoretical investigations of a nontrivial electron Landau-level shift in magnetic field in wide (similar to 20 nm) HgTe quantum wells: Landau levels split under magnetic fields but become degenerate again when magnetic field increases. We reproduced this behavior qualitatively within an isotropic six-band Kane model; then using semiclassical calculations, we showed this behavior is due to the mixing of the conduction band with a total spin of 3/2 with the next well subband with a spin of 1/2, which reduces the average vertical spin from 3/2 to around 1. This change in the average spin changes the Berry phase, explaining the evolution of Landau levels under magnetic field.
引用
收藏
页数：10
相关论文
共 51 条
  • [1] Engineering quantum spin Hall insulators by strained-layer heterostructures
    Akiho, T.
    Couedo, F.
    Irie, H.
    Suzuki, K.
    Onomitsu, K.
    Muraki, K.
    [J]. APPLIED PHYSICS LETTERS, 2016, 109 (19)
  • [2] Geometric Phase and Orbital Moment in Quantization Rules for Magnetic Breakdown
    Alexandradinata, A.
    Glazman, Leonid
    [J]. PHYSICAL REVIEW LETTERS, 2017, 119 (25)
  • [3] THEORY OF OSCILLATORY G-FACTOR IN AN MOS INVERSION LAYER UNDER STRONG MAGNETIC-FIELDS
    ANDO, T
    UEMURA, Y
    [J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1974, 37 (04) : 1044 - 1052
  • [4] Topological Insulator Materials
    Ando, Yoichi
    [J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2013, 82 (10)
  • [5] [Anonymous], 1987, QUANTUM THEORY SOLID
  • [6] Quantum spin Hall effect and topological phase transition in HgTe quantum wells
    Bernevig, B. Andrei
    Hughes, Taylor L.
    Zhang, Shou-Cheng
    [J]. SCIENCE, 2006, 314 (5806) : 1757 - 1761
  • [7] Berry M. V., 1989, Advanced Series in Mathematical Physics, V5, P7, DOI DOI 10.1142/9789812798381_0001
  • [8] QUANTAL PHASE-FACTORS ACCOMPANYING ADIABATIC CHANGES
    BERRY, MV
    [J]. PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1984, 392 (1802) : 45 - 57
  • [9] Quantum Hall Effect from the Topological Surface States of Strained Bulk HgTe
    Bruene, C.
    Liu, C. X.
    Novik, E. G.
    Hankiewicz, E. M.
    Buhmann, H.
    Chen, Y. L.
    Qi, X. L.
    Shen, Z. X.
    Zhang, S. C.
    Molenkamp, L. W.
    [J]. PHYSICAL REVIEW LETTERS, 2011, 106 (12)
  • [10] Single valley Dirac fermions in zero-gap HgTe quantum wells
    Buettner, B.
    Liu, C. X.
    Tkachov, G.
    Novik, E. G.
    Bruene, C.
    Buhmann, H.
    Hankiewicz, E. M.
    Recher, P.
    Trauzettel, B.
    Zhang, S. C.
    Molenkamp, L. W.
    [J]. NATURE PHYSICS, 2011, 7 (05) : 418 - 422
123456