Layered models and tunneling in HTSC

Tunneling current-voltage characteristics of the structures “Normal metal-Isolator-HTSC” (NIS-structure) and “HTSC-Isolator-HTSC” (SIS-structure) are analyzed for the layered model of a high temperature superconductor (HTSC). The contributions of the superconducting and normal layers of HTSC to the...

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Bibliographic Details
Published in:Applied superconductivity 1994-10, Vol.2 (10), p.741-745
Main Authors: Shukrinov, pu.M., Nasrulloev, Kh, Mirpoaminov, Kh, Sarhadov, I.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Multilayers, superlattices , heterostructures
Physics
Proximity effects, weak links, tunneling phenomena, and Josephson effects
Proximity effects, weak links, tunneling phenomena, and josephson effects, adreev effect, sn and sns junctions
Superconducting films and low-dimensional structures
Superconductivity
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Summary:Tunneling current-voltage characteristics of the structures “Normal metal-Isolator-HTSC” (NIS-structure) and “HTSC-Isolator-HTSC” (SIS-structure) are analyzed for the layered model of a high temperature superconductor (HTSC). The contributions of the superconducting and normal layers of HTSC to the tunneling current of NIS- and SIS-structures pas found. There are three and eight peculiarities on the theoretical I( V)-characteristics for NIS- and SIS-structures, correspondingly, phich are connected with singularities in the density of states of HTSC. Comparison is given with experimental data on tunneling in HTSC. The possibility to explain the experimental results (particularly, “knee” structure) by effects of density of states in HTSC on current-voltage characteristics is discussed.
ISSN:0964-1807
1879-1530
DOI:10.1016/0964-1807(94)90075-2