Spin-Dependent Tunneling in a Magnetic Field for Junctions Involving Normal and Superconducting CDW Metals

T. Ekinoa, A.M. Gabovichb, Mai Suan Lic, M. Pękaład, H. Szymczakc and A.I. Voitenkob aFaculty of Integrated Arts and Sciences, Hiroshima University, Higashi-Hiroshima 7398521, Japan bInstitute of Physics, prospekt Nauki 46, Kiev, Ukraine cInstitute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland dDepartment of Chemistry, Warsaw University,Żwirki i Wigury 101, Warsaw, Poland

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Received: 25 09 2005;

The voltage, V, dependences of the differential tunnel conductance G(V) were calculated for two kinds of junctions involving normal and superconducting charge-density-wave metals (CDWMs) in the external magnetic field H. The first is a non-symmetrical junction with a CDWM electrode being biased with respect to a ferromagnet. Calculations show that the paramagnetic splitting occurs between spin-up and spin-down components of G(V), similar to what is observed when a superconducting electrode is used instead of the CDWM one. The second setup is symmetric (CDWM-I-CDWM), where I denotes an insulator. If at least one of the CDWM electrodes is normal and H≢0, G(V) will also be spin-split.

DOI: 10.12693/APhysPolA.109.477 PACS numbers: 71.45.Lr, 74.50.+r, 85.75.-d