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Influence of interlayer tunneling on the quantized Hall phases in intentionally disordered multilayer structures
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Pusep, Yu A., Rodriguez, Alberto, Arakaki, A. H. and de Souza, C. A. (2009) Influence of interlayer tunneling on the quantized Hall phases in intentionally disordered multilayer structures. Journal of Physics-Condensed Matter, Vol.21 (No.20). Article: 205501. doi:10.1088/0953-8984/21/20/205501 ISSN 0953-8984.
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Official URL: http://dx.doi.org/10.1088/0953-8984/21/20/205501
Abstract
Stability of the quantized Hall phases is studied in weakly coupled multilayers as a function of the interlayer correlations controlled by the interlayer tunneling and by the random variation of the well thicknesses. A strong enough interlayer disorder destroys the symmetry responsible for the quantization of the Hall conductivity, resulting in the breakdown of the quantum Hall effect. A clear difference between the dimensionalities of the metallic and insulating quantum Hall phases is demonstrated. The sharpness of the quantized Hall steps obtained in the coupled multilayers with different degrees of randomization was found consistent with the calculated interlayer tunneling energies. The observed width of the transition between the quantized Hall states in random multilayers is explained in terms of the local fluctuations of the electron density.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics Faculty of Science, Engineering and Medicine > Science > Centre for Scientific Computing |
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Journal or Publication Title: | Journal of Physics-Condensed Matter | ||||
Publisher: | IOP Publishing | ||||
ISSN: | 0953-8984 | ||||
Official Date: | 20 May 2009 | ||||
Dates: |
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Volume: | Vol.21 | ||||
Number: | No.20 | ||||
Number of Pages: | 7 | ||||
Page Range: | Article: 205501 | ||||
DOI: | 10.1088/0953-8984/21/20/205501 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Funder: | Spanish Government, JCyL, Fundação de Amparo aÌ€ Pesquisa do Estado de São Paulo (FAPESP), Conselho Nacional de Desenvolvimento CientÃfico e Tecnológico (CNPq) | ||||
Grant number: | JC200700303, FIS2006-00716, MMA-A106/2007, SA052A07 |
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