Low Temperature Physics: 30, 554 (2004); https://doi.org/10.1063/1.1789291 (14 pages)
Физика Низких Температур: Том 30, Выпуск 7-8 (Июль 2004), c. 738-755    ( к оглавлению , назад )

Charge and spin effects in mesoscopic Josephson junctions

Ilya V. Krive1,2, Sergei I. Kulinich1,2, Robert I. Shekhter1, and Mats Jonson1

1Department of Applied Physics, Chalmers University of Technology Göteborg University, SE-412 96 Göteborg, Sweden
E-mail: Shekhter@fy.chalmers.se

2B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, 47 Lenin Ave., Kharkov 61103, Ukraine

Received January 30, 2004

Аннотация

We consider the charge and spin effects in low dimensional superconducting weak links. The first part of the review deals with the effects of electron—electron interaction in Superconductor/ Luttinger liquid/Superconductor junctions. The experimental realization of this mesoscopic hybrid system can be the individual single wall carbon nanotube that bridges the gap between two bulk superconductors. The dc Josephson current through a Luttinger liquid is evaluated in the limits of perfectly and poorly transmitting junctions. The relationship between the Josephson effect in a long SNS junction and the Casimir effect is discussed. In the second part of the paper we review the recent results concerning the influence of the Zeeman and Rashba interactions on the thermodynamical properties of ballistic S–QW–S junction fabricated in two dimensional electron gas. It is shown that in magnetically controlled junction there are conditions for resonant Cooper pair transition which results in giant supercurrent through a tunnel junction and a giant magnetic response of a multichannel SNS junction. The supercurrent induced by the joint action of the Zeeman and Rashba interactions in 1D quantum wires connected to bulk superconductors is predicted.

PACS:
71.10.Pm - Fermions in reduced dimensions (anyons, composite fermions, Luttinger liquid, etc.) (for anyon mechanism in superconductors, see 74.20.Mn)
72.15.Nj - Collective modes (e.g., in one-dimensional conductors)
73.21.Hb - Quantum wires
73.23.-b - Electronic transport in mesoscopic systems
74.50.+r - Tunneling phenomena; point contacts, weak links, Josephson effects (for SQUIDs, see 85.25.Dq; for Josephson devices, see 85.25.Cp; for Josephson junction arrays, see 74.81.Fa)