Low Temperature Physics: 38, 326 (2012); https://doi.org/10.1063/1.3702586 (7 pages)
Физика Низких Температур: Том 38, Выпуск 4 (Апрель 2012), c. 414-422    ( к оглавлению , назад )

dc Josephson current for d-wave superconductors with charge density waves

A.M. Gabovich and A.I. Voitenko

Institute of Physics, National Academy of Sciences of Ukraine 46 Nauka Ave., Kiev 03028, Ukraine
E-mail: gabovich@iop.kiev.ua

Received 23 November, 2011


dc Josephson tunnel current Ic between a dx2y2-wave superconductor with charge density waves (CDWs) — e.g., a high-Tc oxide and a conventional isotropic superconductor — was considered theoretically. A directionality of tunneling was taken into account. It was found that the dependence of Ic on the angle γ between the superconducting lobe direction and the normal to the junction plane is significantly altered by CDWs. For certain doping levels it may be even nonmonotonic, which can be readily found experimentally. For the sake of comparison, the corresponding results obtained for the tunnel junction between a CDW s-superconductor and a conventional isotropic superconductor are also presented.

PACS: 74.20.Fg BCS theory and its development;
PACS: 74.20.Rp Pairing symmetries (other than s-wave);
PACS: 74.50.+r Tunneling phenomena; Josephson effects;
PACS: 71.45.Lr Charge-density-wave systems.

Ключевые слова: charge-density-wave superconductors, d-pairing, cuprates, dc Josephson effect, tunnel directionality.