EXCHANGE FIELD EFFECT ON THE ANDREEV BOUND STATE STUDIED BY FERROMAGNET/HIGH Tc SUPERCONDUCTOR INTERFACE

Autor:	K. W. Ng, Mario Freamat
Rok vydání:	2005
Předmět:	Superconductivity Materials science Ferromagnetism Condensed matter physics Bound state Proximity effect (superconductivity) Field effect Zero-point energy Statistical and Nonlinear Physics Condensed Matter Physics Quantum tunnelling Andreev reflection
Zdroj:	International Journal of Modern Physics B. 19:495-497
ISSN:	1793-6578 0217-9792
DOI:	10.1142/s021797920502889x
Popis:	We have prepared Ag / BSCCO and Fe / Ag / BSCCO planar junctions to study the effect of Fe exchange field on the tunneling spectra. The junctions were constructed so that the tunneling direction is within the ab-plane, either along the maximum or minimum gap direction. Andreev bound states were observed as zero energy peak in the minimum gap direction. The exchange field caused major splitting of the zero energy peak, which did not occur in Ag / BSCCO junctions. We had detected a few percent (6 to 7%) of s-wave subcomponent at the interface in many of these junctions. This s-wave subcomponent had a Tc of about 20K.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8eceda78aba2c36fead2ddb5be8a659b https://doi.org/10.1142/s021797920502889x Zobrazit plný text záznamu