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Critical exponents at the metal-insulator transition in AlPdRe quasicrystals
KTH, School of Information and Communication Technology (ICT), Material Physics, Material Physics, MF.
2005 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 71, no 1Article in journal (Refereed) Published
Abstract [en]

Insulating icosahedral AlPdRe with resistance ratios R[=rho(4.2 K)/rho(295 K)] from 40 to 220 has been studied by magnetoresistance and conductivity measurements. Consistent results for the localization length xi and the characteristic temperature T-o were determined. (R-R-c) increases from the metal insulator transition (MIT) into the insulator as the inverse of the shrinking volume of the electron wave functions similar toxi(-3). Localization is driven by disorder. Evidence is discussed that the MITs in i-AlPdRe and doped semiconductors belong to the same universality class.

Place, publisher, year, edition, pages
2005. Vol. 71, no 1
Keyword [en]
al-pd-re, conductivity exponent, magnetic-field, al70pd22.5re7.5, localization
URN: urn:nbn:se:kth:diva-14490DOI: 10.1103/PhysRevB.71.012202ISI: 000226735100010OAI: diva2:332531
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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Rapp, Östen.
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