The Role of Quantum Interference Effects in Normal-State Transport Properties of Electron-Doped Cuprates
Journal article, 2015
The normal-state resistivity of thin films of the infinite-layer electron-doped cuprate Sr (1-x) La (x) CuO (2 +/-delta) has been investigated. Under-doped samples, which clearly show a metal-to-insulator transition (MIT) at low temperatures, have allowed the determination of the fundamental physical mechanism behind the upturn of the resistivity, namely the quantum interference effects (QIEs) in three-dimensional systems. The occurrence of weak localization effects has been unambiguously proven by low-frequency voltage spectral density measurements, which show a linear dependence of the 1/f noise on the applied bias current at low temperatures. The identification of the QIEs at low temperatures has therefore allowed the determination of the high-temperature non-Fermi liquid metallic phase, which is dominated by a linear temperature dependence of the resistivity for all of the samples investigated.
Superconductivity
Electron-doped cuprates
Metal-insulator-transition
Author
P. Orgiani
National Research Council of Italy (CNR)
A. Galdi
University of Salerno
National Research Council of Italy (CNR)
C. Sacco
University of Salerno
National Research Council of Italy (CNR)
Riccardo Arpaia
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Sophie Charpentier
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Floriana Lombardi
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
C. Barone
National Research Council of Italy (CNR)
University of Salerno
S. Pagano
University of Salerno
National Research Council of Italy (CNR)
D. G. Schlom
Cornell University
L. Maritato
University of Salerno
National Research Council of Italy (CNR)
Journal of Superconductivity and Novel Magnetism
1557-1939 (ISSN) 1557-1947 (eISSN)
Vol. 28 12 3481-3486Areas of Advance
Nanoscience and Nanotechnology
Subject Categories (SSIF 2011)
Nano Technology
DOI
10.1007/s10948-015-3209-0