Critical exponents at the metal-insulator transition in AlPdRe quasicrystals
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
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
al-pd-re, conductivity exponent, magnetic-field, al70pd22.5re7.5, localization
IdentifiersURN: urn:nbn:se:kth:diva-14490DOI: 10.1103/PhysRevB.71.012202ISI: 000226735100010OAI: oai:DiVA.org:kth-14490DiVA: diva2:332531
QC 201005252010-08-052010-08-05Bibliographically approved