TY - JOUR
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
Y1 - 2005/1/3
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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U2 - 10.1142/S021797920502889X
DO - 10.1142/S021797920502889X
M3 - Article
AN - SCOPUS:18544376853
SN - 0217-9792
VL - 19
SP - 495
EP - 497
JO - International Journal of Modern Physics B
JF - International Journal of Modern Physics B
IS - 1-3
ER -