Influence of interlayer tunneling on the quantized Hall phases in intentionally disordered multilayer structures
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
20/10/2012
20/10/2012
2009
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Resumo |
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. Spanish Government[JC200700303] Spanish Government Spanish Government Spanish Government[FIS2006-00716] Spanish Government Spanish Government[MMA-A106/2007] JCyL JCyL[SA052A07] |
Identificador |
JOURNAL OF PHYSICS-CONDENSED MATTER, v.21, n.20, 2009 0953-8984 http://producao.usp.br/handle/BDPI/29702 10.1088/0953-8984/21/20/205501 |
Idioma(s) |
eng |
Publicador |
IOP PUBLISHING LTD |
Relação |
Journal of Physics-condensed Matter |
Direitos |
restrictedAccess Copyright IOP PUBLISHING LTD |
Palavras-Chave | #STRONG MAGNETIC-FIELD #SEMICONDUCTOR SUPERLATTICES #ANDERSON TRANSITION #ELECTRON-GAS #STATES #CONDUCTIVITY #LOCALIZATION #GRAPHENE #SYSTEMS #DIAGRAM #Physics, Condensed Matter |
Tipo |
article original article publishedVersion |