Abstract
We study tunneling conductivity oscillations in a magnetic field in narrow-gap p-HgCdTe-oxide-metal (Yb, Al) structures. In tunnel structures with Yb we detect two types of tunneling conductivity oscillations. The first is related to the crossing of the Landau levels of two-dimensional (2D) states localized in the surface quantum well of the semiconductor, and has an energy E F+eV, where E F is the Fermi energy of the semiconductor and V is the bias voltage; the second has an energy E F. We find that in such structures with an asymmetric quantum well there is strong spin-orbit splitting in the spectrum of the 2D states. In p-HgCdTe-oxide-Al tunnel structures the surface potential is much weaker and only oscillations of the first type are observed. We find that in such structures there is only one spin state of the 2D carriers, while the second is pushed into the continuous spectrum because of strong spin-orbit coupling. To analyze the experimental results we calculate the spectrum of 2D states localized in the surface quantum well in a semiconductor with a Kane dispersion law. We find that all the experimental results are in good agreement with the results of calculations. Finally, we discuss the features of “kinematically coupled” states in an asymmetric quantum well.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
D. C. Tsui, Phys. Rev. B 8, 2657 (1973).
G. M. Min’kov, O. É. Rut, V. A. Larionova, and A. V. Germanenko, Zh. Éksp. Teor. Fiz. 105, 719 (1994) [JETP 78, 384 (1994)].
R. C. Ashoori, J. A. Lebens, N. P. Bigelow, and R. H. Silsbee, Phys. Rev. B 48, 4616 (1993).
K. M. Brown, N. Turner, J. T. Nicholls, E. H. Linfield, M. Pepper, D. A. Ritchie, and G. A. C. Jones, Phys. Rev. B 50, 15 465 (1994).
J. P. Eisenstein, L. N. Preiffer, and K. W. West, Surf. Sci. 305, 393 (1994).
J. P. Eisenstein, L. N. Preiffer, and K. W. West, Phys. Rev. Lett. 69, 3804 (1992).
B. L. Altshuler and A. G. Aronov, in Electron-Electron Interactions in Disordered Systems, A. L. Éfros and M. Pollak (eds), North-Holland, Amsterdam (1985), p. 1.
P. Sobkowicz, Semicond. Sci. Technol. 5, 183 (1990).
Yu. L. Bychkov and É. I. Rashba, JETP Lett. 39, 78 (1984).
G. Dresselhaus, Phys. Rev. 100, 580 (1955).
R. Eppenga and M. F. H. Schuurmans, Phys. Rev. B 37, 10 923 (1988).
J. Luo, H. Munekata, F. F. Fang, and P. J. Stiles, Phys. Rev. B 38, 10 142 (1988).
B. Das, D. C. Miller, S. Datta, R. Reifenberger, W. P. Hong, P. K. Bhattacharya, J. Singh, and M. Jaffe, Phys. Rev. B 39, 1411 (1989).
H. L. Stoermer, T. Haavasoja, V. Narayanamurti et al., J. Vac. Sci. Technol. B 1, 423 (1984).
V. F. Radantsev, Zh. Éksp. Teor. Fiz. 96, 1793 (1989) [Sov. Phys. JETP 69, 1012 (1989)].
V. F. Radantsev, T. I. Deryabina, G. I. Kulaev, and E. L. Rumyantsev, Phys. Rev. B 53, 15 756 (1996).
G. M. Min’kov, A. V. Germanenko, V. V. Kruzhaev, O. É. Rut, and V. A. Larionova, JETP Lett. 62, 330 (1995).
D. C. Tsui, Phys. Rev. B 4, 4438 (1971).
D. C. Tsui, Phys. Rev. B 8, 2657 (1973).
J. Muller and U. Kunze, Semicond. Sci. Technol. 8, 705 (1993).
U. Kunze, Z. Phys. B 80, 47 (1990).
L. P. Zverev, V. V. Kruzhaev, and G. M. Min’kov, Zh. Éksp. Teor. Fiz. 80, 1163 (1981) [Sov. Phys. JETP 53, 595 (1981)].
L. P. Zverev, V. V. Kruzhaev, and G. M. Min’kov, Fiz. Tverd. Tela (Leningrad) 26, 2943 (1984) [Sov. Phys. Solid State 26, 1778 (1984)].
I. M. Tsidil’kovskii, G. I. Harus, and N. S. Shelushinina, Adv. Phys. 34, 43 (1985).
G. M. Minkov, A. V. Germanenko, V. A. Larionova, and O. E. Rut, Phys. Rev. B 54, 1841 (1996).
A. V. Germanenko, G. M. Minkov, V. A. Larionova, O. E. Rut, C. R. Becker, and G. Landwehr, Phys. Rev. B 52, 17 254 (1995).
R. Wollrab, R. Sizman, F. Koch et al., Semicond. Sci. Technol. 4, 491 (1989).
R. E. Doezema and H. D. Drew, Phys. Rev. Lett. 57, 762 (1986).
An-zhen Zhang, J. Slinkman, and R. E. Doezema, Phys. Rev. B 244, 10 752 (1991).
G. M. Minkov, A. V. Germanenko, V. A. Larionova, and O. E. Rut, Semicond. Sci. Technol. 10, 1578 (1995).
Author information
Authors and Affiliations
Additional information
Zh. Éksp. Teor. Fiz. 112, 537–550 (August 1997)
Rights and permissions
About this article
Cite this article
Min’kov, G.M., Rut, O.É. & Germanenko, A.V. Tunneling conductivity oscillations in a magnetic field in metal-insulator-narrow-gap-HgCdTe structures: The energy spectrum and spin-orbit splitting of 2D states. J. Exp. Theor. Phys. 85, 292–299 (1997). https://doi.org/10.1134/1.558277
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1134/1.558277