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

Authors:
ORCiD logo; ORCiD logo; ; ORCiD logo; ; ORCiD logo; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1328577
Grant/Contract Number:
DEFG02- 08ER46531
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 120; Journal Issue: 12; Related Information: CHORUS Timestamp: 2016-12-22 01:24:43; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics
Country of Publication:
United States
Language:
English

Citation Formats

Carabello, Steven, Lambert, Joseph G., Mlack, Jerome, Dai, Wenqing, Li, Qi, Chen, Ke, Cunnane, Daniel, Xi, X. X., and Ramos, Roberto C. Microwave resonant activation in hybrid single-gap/two-gap Josephson tunnel junctions. United States: N. p., 2016. Web. doi:10.1063/1.4963651.
Carabello, Steven, Lambert, Joseph G., Mlack, Jerome, Dai, Wenqing, Li, Qi, Chen, Ke, Cunnane, Daniel, Xi, X. X., & Ramos, Roberto C. Microwave resonant activation in hybrid single-gap/two-gap Josephson tunnel junctions. United States. doi:10.1063/1.4963651.
Carabello, Steven, Lambert, Joseph G., Mlack, Jerome, Dai, Wenqing, Li, Qi, Chen, Ke, Cunnane, Daniel, Xi, X. X., and Ramos, Roberto C. 2016. "Microwave resonant activation in hybrid single-gap/two-gap Josephson tunnel junctions". United States. doi:10.1063/1.4963651.
@article{osti_1328577,
title = {Microwave resonant activation in hybrid single-gap/two-gap Josephson tunnel junctions},
author = {Carabello, Steven and Lambert, Joseph G. and Mlack, Jerome and Dai, Wenqing and Li, Qi and Chen, Ke and Cunnane, Daniel and Xi, X. X. and Ramos, Roberto C.},
abstractNote = {},
doi = {10.1063/1.4963651},
journal = {Journal of Applied Physics},
number = 12,
volume = 120,
place = {United States},
year = 2016,
month = 9
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1063/1.4963651

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  • Taking into account the presence of multimode oscillation, self-resonant current steps in current-voltage characteristics of rectangular Josephson tunnel junctions are studied theoretically. An expression for the zero-field step is obtained, which is shown to be significantly different from previous theories assuming a single-mode oscillation. For a long junction with a length larger than the Josephson penetration depth, the present theory gives the magnetic field dependence of the Fiske step, whose shape is considerably changed from the one calculated from Kulik's theory. The present theory well explains the experimental results for the zero-field step and the Fiske step of long junctions,more » which could not be explained by the previous theories.« less
  • A new method is introduced for imaging of the standing-wave patterns inside superconducting tunnel junctions coupled to an external microwave source. The method is based on electron-beam scanning of the tunnel junctions using the concept of low-temperature scanning electron microscopy. For two different junction geometries, results are shown which confirm the established models for the propagation of microwaves inside superconducting tunnel junctions.
  • One-third harmonic signals have been generated in the zero voltage state of a Josephson tunnel junction driven with a microwave current in the frequency range 8--20 GHz. The signal was as much as 50 dB above the noise level of the detector with a linewidth of less than 100 Hz. The junction parameters and microwave current were measured in situ in separate experiments. The subharmonic generation occurred for ranges of microwave current and frequency that were in reasonable agreement with the results of digital computer simulations.