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- Title
Transport Properties of Topological Insulator-Based Ferromagnet/ f-Wave Superconductor Junction.
- Authors
Goudarzi, H.; Khezerlou, M.; Alilou, J.
- Abstract
We investigate effect of magnetically-induced relativistic mass and also anisotropic f-wave pair coupling on the tunneling conductance on the surface of a 3D topological insulator ferromagnet/superconductor junction, which two types of pairing for superconductivity are possible. A topological insulator as a new state of condensed-matter caused by spin-orbit interaction and time-reversal symmetry has a bulk band gap and gapless surface states. We use the BTK formalism to find the charge carriers behavior. Due to two different nature of order parameters of the f-wave superconductivity, the tunneling conductance is found to be linearly dependent on the magnetic gap in terms of f and the exponential for f. It is shown that the conversion of the conductance peak from ZBCP to ZBCD occurs in the f case with increasing m, while this is not observed in f. Also, we find that the conductance behaves as a unit step function for the superconductor electrostatic potential in f, and this should be usable in nanoelectronic switch devices. In addition, we illustrate how the magnetic gap affects the transmission coefficient in quite different behaviors for order parameters.
- Subjects
SEMICONDUCTOR junctions; TOPOLOGICAL insulators; FERROMAGNETISM; ELECTRON tunneling; MAGNETIC anisotropy; RELATIVISTIC mass; ELECTROSTATICS
- Publication
Journal of Superconductivity & Novel Magnetism, 2013, Vol 26, Issue 12, p3355
- ISSN
1557-1939
- Publication type
Article
- DOI
10.1007/s10948-013-2198-0