Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
1999-04-13
Europhys. Lett. 49, 362-368 (2000)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
5 pages, 3 figures
Scientific paper
10.1209/epl/i2000-00157-x
A two-layer system coupled via tunneling and with different carrier masses in each layer is investigated in the integer quantum Hall regime. Striking deviations of the one-layer Hall conductivity from the usual quantization are found, if resonance between Landau levels of different layers is achieved. The appearance of negative jumps in the Hall conductivity is also predicted under suitable conditions. The results obtained are robust against disorder in the system.
Chudnovskiy Alexander L.
Ulloa Sergio E.
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