Higher-order tunneling processes and enhanced shot noise in superconducting tunnel devices

Teun M. Klapwijk

doi:10.1117/12.496957

9 May 2003 Higher-order tunneling processes and enhanced shot noise in superconducting tunnel devices

Teun M. Klapwijk

Proceedings Volume 5112, Noise as a Tool for Studying Materials; (2003) https://doi.org/10.1117/12.496957
Event: SPIE's First International Symposium on Fluctuations and Noise, 2003, Santa Fe, New Mexico, United States

Abstract

Tunnel barriers play a key role in current applications of superconducting tunnel-devices for THz frequency heterodyne mixing and for magentic tunnel junctions for data-storage applications. Shot noise in the tunnel current limits the sensitivity of tunnel junctions as high frequency detectors. The observed voltage dependence has proven to be a valuable probe to evaluate the quality of the tunnel barrier, in particular for inhomogeneities in thickness or at least for a distribution of transmissivities. It is an open question whether similar measurements can be made informative for magnetic tunnel junctions as well.

Citation Download Citation

Teun M. Klapwijk "Higher-order tunneling processes and enhanced shot noise in superconducting tunnel devices", Proc. SPIE 5112, Noise as a Tool for Studying Materials, (9 May 2003); https://doi.org/10.1117/12.496957

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