Open AccessКвантовые осцилляции магнетосопротивления в гетероструктурах HgCdTe/HgTe/HgCdTe с инвертированным зонным спектром
Author(s) -
А.С. Боголюбский,
С. В. Гудина,
В. Н. Неверов,
К.В. Туруткин,
С. М. Подгорных,
Н. Г. Шелушинина,
М. В. Якунин,
N. N. Mikhaĭlov,
C.А. Дворецкий
Publication year - 2021
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2021.12.51654.33s
Subject(s) - condensed matter physics , magnetoresistance , degenerate energy levels , heterojunction , oscillation (cell signaling) , quantum well , effective mass (spring–mass system) , hall effect , chemistry , electron , shubnikov–de haas effect , magnetic field , physics , quantum oscillations , optics , fermi surface , quantum mechanics , laser , biochemistry , superconductivity
The effects observed in the Shubnikov - de Haas oscillation regime in the HgCdTe/HgTe/HgCdTe heterostructure with a wide (20.3 nm) HgTe quantum well with an inverted band structure are discussed. In a topologically trivial 2D system, Pi(Greek letter) - shift of magnetooscillation phase is found. A thorough experimental study and theoretical analysis of the data is presented to understand the physical causes of this anomalous phase shift. The value of the effective electron mass m_c/m_0 = (0.022+-0.002), obtained from the region of doubly degenerate peaks of magnetoresistance, is approximately half the theoretical estimates. In the region of stronger magnetic fields for nondegenerate peaks of magnetoresistance, we have m_c/m_0 = (0.034+-0.003), which is in good agreement with both theoretical predictions and experimental results obtained from the analysis of activation conductivity in the quantum Hall effect regime. The reasons for this discrepancy are discussed.