Metastability of the quantum Hall states in asymmetric two-layer systems

Journal of Physics Condensed Matter

Volumn 10, Issue 37, 1998, Pages 8305-8311

  Takagaki, Y ^a   Friedland, K J ^a   Ploog, K H ^a   Muraki, K ^b  

^a PAUL DRUDE INSTITUT FÜR FESTKÖRPERELEKTRONIK   (Germany)

^b Kashino Diverse Brain Research Laboratory of NTT Communication Science Laboratories   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0005547076     PISSN: 09538984     EISSN: None     Source Type: Journal    
DOI: 10.1088/0953-8984/10/37/016     Document Type: Article

References (15)

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8. Hawrylak P, Pulsford N and Ploog K 1992 Phys. Rev. B 46 15 193
9. The large spin gap observed in the SdH oscillation is due to the exchange enhancement of the effective g-factor. The actual energy gap between the two spin states is small because of the small effective g-factor in GaAs, and so the ESS Landau level crosses the two spin levels of the GSS Landau level simultaneously.
10. When the electron density is just above the population threshold of the ESS, all of the SdH peaks of the GSS exhibit a simultaneous splitting; see reference [4]. However, the oscillations when the electron density in the ESS is considerable simply consist of two sets of the SdH oscillations due to the GSS and the ESS. The transition between the two regimes is not well understood because the charge transfer significantly broadens the ESS peak around the level crossing, as seen in figures 2 and 3.
11. Whether the sample is illuminated at a resistance dip or a peak, for example at B = 11.8 T instead of 14 T, makes no difference for the existence of metastability. This insensitivity is understandable, as the GSS does not accommodate the photo-generated electrons.
12. Ye Q Y, Shklovskii B I, Zrenner A, Koch F and Ploog K 1990 Phys. Rev B 41 8477
13. Dötzer R, Friedland K-J, Hey R, Kostial H, Miehling H and Schöpe W 1994 Semicond. Sci. Technol. 9 1332
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15. Takagaki Y and Ploog K 1995 J. Phys.: Condens. Matter 7 731