Superconductivity in one dimension

Arutyunov, K.Yu. (Dept. of Phys., Univ. of Jyvaskyla, Jyvaskyla, Finland); Golubev, D.S.; Zaikin, A.D. Source: Physics Reports, v 464, n 1-2, July 2008, 1-70

ISSN: 0370-1573 CODEN: PRPLCM

Publisher: Elsevier Science B.V., Netherlands 

Abstract: Superconducting properties of metallic nanowires can be entirely different from those of bulk superconductors because of the dominating role played by thermal and quantum fluctuations of the order parameter. For superconducting wires with diameters below ~50 nm quantum phase slippage is an important process which can yield a non-vanishing wire resistance down to very low temperatures. Further decrease of the wire diameter, for typical material parameters down to ~10 nm, results in proliferation of quantum phase slips causing a sharp crossover from superconducting to normal behavior even at T=0. A number of interesting phenomena associated both with quantum phase slips and with the parity effect occur in superconducting nanorings. We review recent theoretical and experimental activities in the field and demonstrate dramatic progress in understanding of the phenomenon of superconductivity in quasi-one-dimensional nanostructures.[All rights reserved Elsevier]. (246 refs.)

terms: electrical resistivity - metals - nanowires - type I superconductors