Theoretical Study of Point-Contact Andreev Reflection Spectroscopy for Ferromagnetic Metal/Insulator/D-Wave Superconductor Junctions

Author

Ohtori, H. ; Imamura, H.

Author_Institution

Inst. of Appl. Phys., Univ. of Tsukuba, Tsukuba, Japan

Volume

48

Issue

11

fYear

2012

Firstpage

2827

Lastpage

2830

Abstract

This paper theoretically analyzed Andreev reflection in the ferromagnetic metal/insulator/d-wave superconductor junctions using the Bogoliubov-de Gennes equations. We calculated the total tunneling conductance spectra and found that the conductance suppression due to the insulator depends on the relation between the exchange energy and the Fermi wave number difference. Our results showed the feasibility of the spin polarization measurement with high-T_c superconductivity using the same system of the Point-contact Andreev reflection (PCAR) measurement.

Keywords

Fermi level; d-wave superconductivity; electrical conductivity; ferromagnetic materials; high-temperature superconductors; point contact spectroscopy; spin polarised transport; superconductive tunnelling; Bogoliubov-de Gennes equations; Fermi wave number difference; PCAR measurement; conductance suppression; exchange energy; ferromagnetic metal-insulator-d-wave superconductor junctions; high-T_c superconductivity; point-contact Andreev reflection measurement; point-contact Andreev reflection spectroscopy; spin polarization measurement; tunneling conductance spectra; Electric potential; Frequency modulation; Insulators; Josephson junctions; Junctions; Metals; Temperature measurement; PLEASE PROVIDE KEYWORDS;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2012.2206575

Filename

6332878