Nalazite se na CroRIS probnoj okolini. Ovdje evidentirani podaci neće biti pohranjeni u Informacijskom sustavu znanosti RH. Ako je ovo greška, CroRIS produkcijskoj okolini moguće je pristupi putem poveznice www.croris.hr
izvor podataka: crosbi

Quantum-critical region of the disorder-driven superconductor – insulator transition (CROSBI ID 137875)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Baturina, Tatyana ; Bilušić, Ante ; Mironov, Aleksey ; Vinokur, Valerii ; Baklanov, Mikhail ; Strunk, Christoph Quantum-critical region of the disorder-driven superconductor – insulator transition // Physica. C, Superconductivity, 468 (2008), 4; 316-321. doi: 10.1016/j.physc.2007.08.023

Podaci o odgovornosti

Baturina, Tatyana ; Bilušić, Ante ; Mironov, Aleksey ; Vinokur, Valerii ; Baklanov, Mikhail ; Strunk, Christoph

engleski

Quantum-critical region of the disorder-driven superconductor – insulator transition

We investigate low temperature transport properties of thin TiN superconducting films, differing by the degree of disorder. At zero magnetic field we find an extremely sharp separation between the superconducting- and insulating phases, indicating a direct superconductor– insulator transition without an intermediate metallic phase. We show that in the critical region of the transition a peculiar highly inhomogeneous insulating state with superconducting correlations forms. The insulating films exhibit thermally activated conductivity and huge positive magnetoresistance at low magnetic fields. A sharp depinning transition at some voltage VT is observed in the I– V curves at very low temperatures. We propose a percolation type of depinning with the threshold voltage determined by the Coulomb blockade energy for the Cooper pairs between neighboring self-induced superconducting islands, with VT being the total voltage along the first conduction path. The observed hysteretic behavior of the threshold and steps on the dI/dV vs. V curves support this percolation picture of the depinning transition.

superconductivity; socalization; quantum phase transition

Rad je prezentiran na skupu Tthe Workshop on Fluctuations and Phase Transitions in Superconductors, održanom od 10.–14.06.2007., Nazareth Ilit, Israel.

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

Podaci o izdanju

468 (4)

2008.

316-321

objavljeno

0921-4534

10.1016/j.physc.2007.08.023

Povezanost rada

Fizika

Poveznice
Indeksiranost