Andreev scattering of quasiparticle wave packets and current-voltage characteristics of superconducting metallic weak links

1990 ◽  
Vol 42 (7) ◽  
pp. 3992-4009 ◽  
Author(s):  
Reiner Kümmel ◽  
Uwe Gunsenheimer ◽  
Roberto Nicolsky
Keyword(s):  
Wave Packets ◽  
Weak Links ◽  
Current Voltage ◽  
Current Voltage Characteristics ◽  
Andreev Scattering

scholarly journals Current-voltage characteristics of semiconductor-coupled superconducting weak links with large electrode separations

1998 ◽  
Vol 58 (17) ◽  
pp. 11676-11684 ◽  
Author(s):  
Mason Thomas ◽  
Hans-Richard Blank ◽  
Ki C. Wong ◽  
Herbert Kroemer ◽  
Evelyn Hu
Keyword(s):  
Weak Links ◽  
Current Voltage ◽  
Current Voltage Characteristics

Superfluid Density in Ultrathin YBCO Films

2000 ◽  
Vol 659 ◽  
Author(s):  
Lyuba A. Delimova ◽  
Igor V. Grekhov ◽  
Ivan A. Liniichuk ◽  
Ivan A. Veselovsky ◽  
Konstantin B. Traito ◽  
...  
Keyword(s):  
Superfluid Density ◽  
Transport Current ◽  
Weak Links ◽  
Transition Model ◽  
Resistive State ◽  
Resistive Transition ◽  
Current Increase ◽  
Ybco Films ◽  
Current Voltage ◽  
Current Voltage Characteristics

ABSTRACTWe studied the transition of 8 nm-thick YBCO films deposited with and without YBaCuNbO buffer from the superconducting to resistive state due to the temperature or transport current increase. For both film types, the current –voltage characteristics and resistive transition followed the Kosterlitz-Thouless transition model. The superfluid densities were found from the Kosterlitz-Thouless transition temperature TKT to be about 3% and 1.3% of the total carrier density in YBCO with and without buffer, respectively. We believe that the low superfluid densities indicate the presence of weak links in the film.

scholarly journals A new theory of the current-voltage characteristics of weak links

Physica ◽  
1971 ◽  
Vol 55 ◽  
pp. 405-412 ◽  
Author(s):  
J. Clarke ◽  
A.B. Pippard ◽  
J.R. Waldram
Keyword(s):  
Weak Links ◽  
Current Voltage ◽  
Current Voltage Characteristics

scholarly journals Theory of the current-voltage characteristics of SNS junctions and other superconducting weak links

1970 ◽  
Vol 268 (1188) ◽  
pp. 265-287 ◽  
Keyword(s):  
Phase Locking ◽  
Current Source ◽  
Voltage Source ◽  
Weak Links ◽  
Detailed Calculation ◽  
Flux Flow ◽  
Step Structure ◽  
Current Voltage ◽  
Current Voltage Characteristics ◽  
Density Equation

A theory of the current-voltage characteristics of superconducting-normal-superconducting junctions is proposed. The theory is based on a simple model current-density equation. The form of the currentvoltage characteristic is found to depend critically on whether the electrical source should be treated as a current source or a voltage source at high frequencies. A picture is given of the dynamical state of a junction at finite voltage, and all the important differences between the characteristics observed for SNS junctions and tunnel junctions are explained at least qualitatively. In particular, the theory covers the cases of a junction wide enough to be limited by its own field and the step structure known to be induced by an applied h.f. field. For wide junctions the predicted behaviour is an exactly calculable quantized flux flow in one dimension. It is the phase-locking of this flux flow by the applied h.f. field which leads to the step structure. A detailed calculation of the rounding of the steps by noise is given; the steps are predicted to be exceedingly steep. The theory is compared with the theories of other superconducting weak links.

A Model Analysis for Current-Voltage Characteristics of Superconducting Weak Links

1997 ◽  
Vol 36 (Part 2, No. 3A) ◽  
pp. L272-L275 ◽  
Author(s):  
Kazuo Saitoh ◽  
Yoshihiro Ishimaru ◽  
Hiroyuki Fuke ◽  
Youichi Enomoto
Keyword(s):  
Model Analysis ◽  
Weak Links ◽  
Current Voltage ◽  
Current Voltage Characteristics
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