Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Landau level spectroscopy of valence bands in HgTe quantum wells : Effects of symmetry lowering. / Bovkun, L. S.; Ikonnikov, A. V.; Aleshkin, V. Ya и др.
в: Journal of Physics Condensed Matter, Том 31, № 14, 145501, 10.04.2019, стр. 145501.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Landau level spectroscopy of valence bands in HgTe quantum wells
T2 - Effects of symmetry lowering
AU - Bovkun, L. S.
AU - Ikonnikov, A. V.
AU - Aleshkin, V. Ya
AU - Spirin, K. E.
AU - Gavrilenko, V. I.
AU - Mikhailov, N. N.
AU - Dvoretskii, S. A.
AU - Teppe, F.
AU - Piot, B. A.
AU - Potemski, M.
AU - Orlita, M.
PY - 2019/4/10
Y1 - 2019/4/10
N2 - The Landau level spectroscopy technique has been used to explore the electronic structure of the valence band in a series of p-type HgTe/HgCdTe quantum wells with both normal and inverted ordering of bands. We find that the standard axial-symmetric 4-band Kane model, which is nowadays widely applied in physics of HgTe-based topological materials, does not fully account for the complex magneto-optical response observed in our experiments - notably, for the unexpected avoided crossings of excitations and for the appearance of transitions that are electric-dipole forbidden within this model. Nevertheless, reasonable agreement with experiments is achieved when the standard model is expanded to include effects of bulk and interface inversion asymmetries. These remove the axial symmetry, and among other, profoundly modify the shape of valence bands.
AB - The Landau level spectroscopy technique has been used to explore the electronic structure of the valence band in a series of p-type HgTe/HgCdTe quantum wells with both normal and inverted ordering of bands. We find that the standard axial-symmetric 4-band Kane model, which is nowadays widely applied in physics of HgTe-based topological materials, does not fully account for the complex magneto-optical response observed in our experiments - notably, for the unexpected avoided crossings of excitations and for the appearance of transitions that are electric-dipole forbidden within this model. Nevertheless, reasonable agreement with experiments is achieved when the standard model is expanded to include effects of bulk and interface inversion asymmetries. These remove the axial symmetry, and among other, profoundly modify the shape of valence bands.
KW - band structure methods
KW - electronic structure
KW - k · p method
KW - Landau levels
KW - quantum wells
KW - semiconductors
KW - topological insulators
KW - GERMANIUM
KW - CYCLOTRON-RESONANCE
KW - k . p method
KW - ZINCBLENDE SEMICONDUCTORS
UR - http://www.scopus.com/inward/record.url?scp=85061868936&partnerID=8YFLogxK
U2 - 10.1088/1361-648X/aafdf0
DO - 10.1088/1361-648X/aafdf0
M3 - Article
C2 - 30634183
AN - SCOPUS:85061868936
VL - 31
SP - 145501
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
SN - 0953-8984
IS - 14
M1 - 145501
ER -
ID: 18679211