scholarly journals Generation of odd-frequency surface superconductivity with spontaneous spin current due to the zero-energy Andreev bound state

2021 ◽  
Vol 103 (24) ◽  
Author(s):  
Shun Matsubara ◽  
Yukio Tanaka ◽  
Hiroshi Kontani
Keyword(s):  
Spin Current ◽  
Bound State ◽  
Zero Energy ◽  
Surface Superconductivity ◽  
Andreev Bound State

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

2005 ◽  
Vol 19 (01n03) ◽  
pp. 495-497 ◽  
Author(s):  
K.-W. NG ◽  
MARIO FREAMAT
Keyword(s):  
Bound States ◽  
Bound State ◽  
Exchange Field ◽  
Zero Energy ◽  
S Wave ◽  
High Tc ◽  
Andreev Bound States ◽  
High Tc Superconductor ◽  
Energy Peak ◽  
Andreev Bound State

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.

scholarly journals Study on Nonmagnetic Impurities in the Superconducting State of Two-Dimensional t-J Model

1998 ◽  
Vol 12 (24) ◽  
pp. 2447-2454 ◽  
Author(s):  
Hideki Tanaka ◽  
Kazuhiro Kuboki ◽  
Manfred Sigrist
Keyword(s):  
Superconducting State ◽  
Mean Field ◽  
Bound State ◽  
Field Approximation ◽  
Mean Field Approximation ◽  
Zero Energy ◽  
S Wave ◽  
Localized State ◽  
Nonmagnetic Impurities ◽  
Andreev Bound State

We study the effect of nonmagnetic impurities in the superconducting state of the t–J model. The Bogoliubov de Gennes equation is derived using a slave-boson mean-field approximation, and we solve it numerically at T = 0. The dx2-y2-wave order parameter is suppressed near an impurity and the extended s-wave component is induced. We also find the local CDW-like feature due to the Friedel oscillations. This leads to the splitting of the expected zero-energy Andreev bound state. Therefore the system is unlikely introducing a localized state of other symmetry such as superconductivity with broken time reversal symmetry or antiferromagnetism.

Andreev bound state in a superconducting double barrier junction: The role of anisotropic dx2−y2-wave pairing potential

2012 ◽  
Vol 152 (24) ◽  
pp. 2133-2137 ◽  
Author(s):  
Shuanwen Jia ◽  
Baolin Ma ◽  
Ke-Wei Wei ◽  
Yanling Yang ◽  
Chunxu Bai
Keyword(s):  
Bound State ◽  
Double Barrier ◽  
Wave Pairing ◽  
Andreev Bound State ◽  
Pairing Potential
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