Low Temperature Physics: 34, 868 (2008); https://doi.org/10.1063/1.3006395 (7 pages)
Физика Низких Температур: Том 34, Выпуск 10 (Октябрь 2008), c. 1098-1106    ( к оглавлению , назад )

Giant magnetization of a superconductor-two-dimensional electron gas-superconductor structure

I.A. Romanovsky1, E.N. Bogachek1, I.V. Krive2,3, and Uzi Landman1

1 School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332-0430
E-mail: igor.romanovsky@gmail.com

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

3 Department of Physics, Göteborg University, SE 41296 Göteborg , Sweden

Received April 23, 2008

Аннотация

Superconductivity induced phase-controlled mesoscopic magnetic effects in a two-dimensional electron gas that bridges two superconducting reservoirs are investigated. Giant paramagnetic response of the junction, occuring at certain values of the phase difference of the order parameter, is predicted. A geometrically similar system, consisting of a graphene ribbon stretched between two superconducting leads, is also considered. The magnetic effects in this system are found to be small and the difference between the magnetic properties of the two systems is discussed.

PACS: 73.63.Nm Quantum wires;
PACS: 74.78.Na Mesoscopic and nanoscale systems;
PACS: 74.45.+c Proximity effects; Andreev effect; SN and SNS junctions;
PACS: 74.25.Bt Thermodynamic properties;
PACS: 74.25.Ha Magnetic properties.

Ключевые слова: supercurrent, magnetization, Andreev levels, graphene.