KIT | KIT-Bibliothek | Impressum | Datenschutz

Kondo-like transport and magnetic field effect of charge carrier fluctuations in granular aluminum oxide thin films

Barone, C.; Rotzinger, H. ORCID iD icon 1; Mauro, C.; Dorer, D. 1; Münzberg, J. 1; Ustinov, A. V. 1; Pagano, S.
1 Physikalisches Institut (PHI), Karlsruher Institut für Technologie (KIT)


Granular aluminum oxide is an attractive material for superconducting quantum electronics. However, its low-temperature normal state transport properties are still not fully understood, while they could be related to the unconventional phenomenon of the superconductivity in this material. In order to obtain useful information on this aspect, a detailed study of charge carrier fluctuations has been performed in granular aluminum oxide films. The results of electric noise measurements indicate the presence of a Kondo-type spin-flip scattering mechanism for the conducting electrons in the normal state, at low temperatures. Moreover, the magnetic field dependence of the noise amplitude suggests that interface magnetic moments are the main source of fluctuations. The identification of the nature of fluctuation processes is a mandatory requirement for the improvement of quality and performance of quantum devices.

Verlagsausgabe §
DOI: 10.5445/IR/1000086106
Veröffentlicht am 01.10.2018
DOI: 10.1038/s41598-018-32298-1
Zitationen: 16
Web of Science
Zitationen: 16
Zitationen: 18
Cover der Publikation
Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 12.2018
Sprache Englisch
Identifikator ISSN: 2045-2322
KITopen-ID: 1000086106
Erschienen in Scientific reports
Verlag Nature Research
Band 8
Heft 1
Seiten Article: 13892
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 17.09.2018
Nachgewiesen in Dimensions
Web of Science
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page