Microwave resonant activation in hybrid single-gap/two-gap Josephson tunnel junctions

Carabello, Steven; Lambert, Joseph G.; Mlack, Jerome; Dai, Wenqing; Li, Qi; Chen, Ke; Cunnane, Daniel; Xi, X. X.; Ramos, Roberto C.

doi:10.1063/1.4963651

Title: Microwave resonant activation in hybrid single-gap/two-gap Josephson tunnel junctions

Journal Article · Wed Sep 28 00:00:00 EDT 2016 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4963651· OSTI ID:1468937

^[1];

^[2]; Mlack, Jerome ^[2];

^[3]; Li, Qi ^[3];

^[4]; Cunnane, Daniel ^[4]; Xi, X. X. ^[4]; Ramos, Roberto C. ^[5]

Penn State Harrisburg, Middletown, PA (United States)
Drexel Univ., Philadelphia, PA (United States)
Pennsylvania State Univ., University Park, PA (United States)
Temple Univ., Philadelphia, PA (United States)
Univ. of the Sciences, Philadelphia, PA (United States)

Microwave resonant activation is a powerful, straightforward technique to study classical and quantum systems, experimentally realized in Josephson junction devices cooled to very low temperatures. These devices typically consist of two single-gap superconductors separated by a weak link. We report the results of the first resonant activation experiments on hybrid thin film Josephson junctions consisting of a multi-gap superconductor (MgB₂) and a single-gap superconductor (Pb or Sn). We can interpret the plasma frequency in terms of theories both for conventional and hybrid junctions. Using these models, we determine the junction parameters including critical current, resistance, and capacitance and find moderately high quality factors of Q₀~100 for these junctions

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Research Organization:: Penn State Harrisburg, Middletown, PA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: FG02-08ER46531

OSTI ID:: 1468937

Alternate ID(s):: OSTI ID: 1328577

Journal Information:: Journal of Applied Physics, Vol. 120, Issue 12; ISSN 0021-8979

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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