Quantum Hall Effect on the Hofstadter Butterfly(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
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Motivated by recent experimental attempts to detect the Hofstadter butterfly, we numerically calculate the Hall conductivity in a modulated two-dimensional electron system with disorder in the quantum Hall regime. We identify the critical energies where the states are extended for each of butterfly subbands, and obtain the trajectory as a function of the disorder Remarkably, we find that, when the modulation becomes anisotropic, the critical energy branches accompanying a change of the Hall conductivity.
- 社団法人日本物理学会の論文
- 2004-12-15
著者
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ANDO Tsuneya
Department of Physics, Tokyo Institute of Technology
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Koshino Mikito
Department Of Physics Tokyo Institute Of Technology
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