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| VOLUME 102 (2015) | ISSUE 1 | PAGE 40 |
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Interaction-induced merging of Landau levels in an electron system of double quantum wells
A. A. Shashkin+, V. T. Dolgopolov+, J. W. Clark*, V. R. Shaginyan×, M. V. Zverev°∇, V. A. Khodel*°
+Institute of Solid State Physics, 142432 Chernogolovka, Russia *McDonnell Center for the Space Science and Department of Physics, Washington University, MO 63130 St. Louis, USA ×Petersburg Nuclear Physics Institute, National Research Center "Kurchatov Institute", 188300 Gatchina, Russia °National Research Centre "Kurchatov Institute", 123182 Moscow, Russia ∇Moscow Institute of Physics and Technology, 141700 Dolgoprudny, Russia
Abstract
We show that the disappearance of the chemical potential jumps over the range of perpendicular magnetic fields at fixed integer filling factor in a double quantum well with a tunnel barrier is caused by the interaction-induced level merging. The distribution function in the merging regime is special in that the probability to find an electron with energy equal to the chemical potential is different for the two merged levels. |