Current-Phase Relation of YBa2Cu3O7-X/Nb Unconventional Superconductor Junctions

Boris Chesca; Henk Jan Smilde; Hans Hilgenkamp

doi:10.4028/www.scientific.net/MSF.670.38

Paper Titles

Stability of Toroidal SMES Using YBCO Tapes for Simultaneous Quench of a few Coils
p.3

Qualification of YBCO Rings and 100% YBCO Wire Loops with the Transformation of the DC Magnetic Field
p.11

High Pressure Synthesized Magnesium Diboride- and Dodecaboride-Based Superconductors: Structure and Properties
p.21

Impact of the Magnetic Flux Penetrating Vortex Core on the Critical Current of the HTc Superconductors
p.28

Current-Phase Relation of YBa₂Cu₃O_7-X/Nb Unconventional Superconductor Junctions
p.38

Design and Optimization of UAQ4 Experimental Maglev Module
p.42

Construction of Development Technology of Next Generation Applied Electromagnetic Machinery in Japan
p.51

Two-Dimensional Local Vector Magnetic Property Measurements by Use of Simple Transducers
p.60

Study of the Magnetic Anisotropy of the Grain Oriented (GO) and Non-Oriented (NO) Silicon Iron Materials
p.66

HomeMaterials Science ForumMaterials Science Forum Vol. 670Current-Phase Relation of YBa2Cu3O7-X/Nb...

Current-Phase Relation of YBa₂Cu₃O_7-X/Nb Unconventional Superconductor Junctions

Abstract:

The knowledge of the current-phase relation (CPR) in superconducting junctions is essential in many applications like low-dissipative superconducting electronics or superconducting qubits for quantum computation. Theory predicts that unconventional superconductivity induces a significant second harmonic J2 in the CPR. Consequently, anomalies such as half-integer Shapiro steps should be observed in the microwave assisted current-voltage characteristics of the junctions. We performed electric transport measurements in YBa2Cu3O7-x/Nb unconventional superconductor junctions for 72 different tunneling directions in the ab plane and found no trace of such anomalies. This suggest that J2 is insignificantly small so that YBa2Cu3O7-x/Nb junctions have a purely sinusoidal CPR.

You might also be interested in these eBooks

View Preview

View Preview

Info:

Periodical:

Materials Science Forum (Volume 670)

Pages:

38-41

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.670.38

Citation:

Cite this paper

Online since:

December 2010

Authors:

Boris Chesca, Henk Jan Smilde, Hans Hilgenkamp

Keywords:

Low Temperature Electric, Thin Film Superconducting Cuprate Junction, Transport Measurement, Unconventional Superconductivity

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] J. Bardeen, L. N. Cooper, and J. R. Schrieffer, Theory of Superconductivity, Phys. Rev. 108, 1175, (1957).

DOI: 10.1103/physrev.108.1175

Google Scholar

[2] A. A. Golubov, M. Yu. Kupriyanov, and E. Il'ichev, The current-phase relation in Josephson junctions. Rev. Mod. Phys. 76, 411, (2004).

DOI: 10.1103/revmodphys.76.411

Google Scholar

[3] M. Samanta and S. Datta, Effect of midgap states in d- wave superconductors on the flux quantization in tricrystal rings. Phys. Rev. B 55, R8689, (1997).

DOI: 10.1103/physrevb.55.r8689

Google Scholar

[4] Y. Tanaka, and S. Kashiwaya, Theory of Josephson effects in anisotropic superconductors. Phys. Rev. B 56, 892, (1997).

DOI: 10.1103/physrevb.56.892

Google Scholar

[5] M. H. S. Amin, A. Yu. Smirnov, A. M. Zagoskin, T. Lindström, S. A. Charlebois, T. Claeson, and A. Ya. Tzalenchuk, Silent phase qubit based on d -wave Josephson junctions. Phys. Rev. B 71, 064516, (2005).

DOI: 10.1103/physrevb.71.064516

Google Scholar

[6] B. Chesca, H.J.H. Smilde, H. Hilgenkamp, Upper bound on the Andreev states induced second harmonic in the Josephson coupling of YBa2Cu3O7−δ/Nb junctions from experiment and numerical simulations, Phys. Rev. B 77, 184510 (2008).

DOI: 10.1103/physrevb.77.184510

Google Scholar

[7] J. M. Dekkers, G. Rijnders, S. Harkema, H. J. H. Smilde, H. Hilgenkamp, H. Rogalla, D. H. A. Blank, Monocrystalline YBa2Cu3O7–x thin films on vicinal SrTiO3 (001) substrates. Appl. Phys. Lett. 83, 5199, (2003).

DOI: 10.1063/1.1633010

Google Scholar

[8] H.J.H. Smilde, A. A. Golubov, Ariando, G. Rijnders, J. M. Dekkers, S. Harkema, D. H. Blank, H. Rogalla, and H. Hilgenkamp, Admixtures to d- Wave Gap Symmetry in Untwinned YBa2Cu3O7 Superconducting Films Measured by Angle-Resolved Electron Tunneling. Phys. Rev. Lett. 95, 257001, (2005).

DOI: 10.1103/physrevlett.95.257001

Google Scholar

[9] B. Chesca, D. Dönitz, T. Dahm, R. Huebener, D. Koelle, R. Kleiner, A. Ariando, H. Hilgenkamp, Observation of Andreev bound states in YBa2Cu3O7-x /Au/Nb ramp-type junctions, Phys. Rev. B 73, 014529, (2006).

DOI: 10.1103/physrevb.73.014529

Google Scholar