Exchange field effect on the Andreev bound state studied by ferromagnet/high Tc superconductor interface

K. W. Ng; Mario Freamat

doi:10.1142/S021797920502889X

Exchange field effect on the Andreev bound state studied by ferromagnet/high T_c superconductor interface

K. W. Ng, Mario Freamat

Physics And Astronomy

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

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 T_c of about 20K.

Original language	English
Pages (from-to)	495-497
Number of pages	3
Journal	International Journal of Modern Physics B
Volume	19
Issue number	1-3
DOIs	https://doi.org/10.1142/S021797920502889X
State	Published - Jan 3 2005

Keywords

Andreev bound state
Ferromagnet
High Tc superconductor
LOFF states
Proximity effect
Tunneling junction

ASJC Scopus subject areas

Statistical and Nonlinear Physics
Condensed Matter Physics

Access to Document

10.1142/S021797920502889X

Cite this

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title = "Exchange field effect on the Andreev bound state studied by ferromagnet/high Tc superconductor interface",

abstract = "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.",

keywords = "Andreev bound state, Ferromagnet, High Tc superconductor, LOFF states, Proximity effect, Tunneling junction",

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year = "2005",

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T1 - Exchange field effect on the Andreev bound state studied by ferromagnet/high Tc superconductor interface

AU - Ng, K. W.

AU - Freamat, Mario

PY - 2005/1/3

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N2 - 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.

AB - 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.

KW - Andreev bound state

KW - Ferromagnet

KW - High Tc superconductor

KW - LOFF states

KW - Proximity effect

KW - Tunneling junction

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