Andreev reflection in Bi_{1.8}Pb_{0.3}Sr_{1.9}Ca_2Cu_3O_x break junction
D.M. Gokhfeld, D.A. Balaev, K.A. Shaykhutdinov, S.I. Popkov, M.I., Petrov
TL;DR
This study investigates the current-voltage characteristics of a Bi-based superconductor break junction, revealing hysteresis and negative differential resistance, explained through multiple Andreev reflections within a superconductor-normal metal-superconductor model.
Contribution
It provides experimental data on the CVC of Bi-based superconductor junctions and interprets the results using the Kummel-Gunsenheimer-Nicolsky theory.
Findings
Hysteretic current-voltage behavior observed
Negative differential resistance identified in CVC
Analysis supports multiple Andreev reflections as the mechanism
Abstract
The current-voltage characteristic (CVC) of break junction made from polycrystalline Bi_{1.8}Pb_{0.3}Sr_{1.9}Ca_2Cu_3O_x is investigated. The experimental CVC has hysteretic feature that reflects a part of a curve with negative differential resistance. The CVC is discussed within the framework of the Kummel-Gunsenheimer-Nicolsky theory considering multiple Andreev reflections in superconductor/normal-metal/superconductor junctions.
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