Presentation | 2014-01-24 Effect of quasiparticles in the intra-gap states on the property of superconducting resonators Takashi NOGUCHI, Masato NARUSE, Masakazu SEKINE, Ken'ichi KARATSU, Yutaro SEKIMOTO, |
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Abstract(in Japanese) | (See Japanese page) |
Abstract(in English) | We propose a hypothesis that there are a few numbers of quasiparticle states inside the energy gap and analyze the surface resistance and the Q-values of a resonator of superconductor using the hypothesis. The conventional Mattis-Bardeen theory is extended by introducing the complex number of the superconducting gap energy, which well predicts the magnitude of the quasiparticle density of states inside the energy gap. Using the extended Mattis-Bardeen theory, the surface resistance of superconductors and the Q-value of superconducting resonators are calculated. It is shown that simulated temperature dependence of the surface resistance and Q-value of a superconductor agree very well with the experimental results. It is also demonstrated that the calculated residual quasiparticle number of a superconducting resonator using the density of states, which is obtained from the fitting of a dc I-V curve of SIS tunnel junction, quantitatively agrees with the measured one. |
Keyword(in Japanese) | (See Japanese page) |
Keyword(in English) | superconductor / surface resistance / resonator / quasiparticle / density of states |
Paper # | SCE2013-46 |
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Conference Information | |
Committee | SCE |
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Conference Date | 2014/1/16(1days) |
Place (in Japanese) | (See Japanese page) |
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Paper Information | |
Registration To | Superconductive Electronics (SCE) |
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Language | JPN |
Title (in Japanese) | (See Japanese page) |
Sub Title (in Japanese) | (See Japanese page) |
Title (in English) | Effect of quasiparticles in the intra-gap states on the property of superconducting resonators |
Sub Title (in English) | |
Keyword(1) | superconductor |
Keyword(2) | surface resistance |
Keyword(3) | resonator |
Keyword(4) | quasiparticle |
Keyword(5) | density of states |
1st Author's Name | Takashi NOGUCHI |
1st Author's Affiliation | National Astronomical Observatory of Japan() |
2nd Author's Name | Masato NARUSE |
2nd Author's Affiliation | Graduate School of Science and Engineering, Saitama University |
3rd Author's Name | Masakazu SEKINE |
3rd Author's Affiliation | Graduate School of Science, The University of Tokyo |
4th Author's Name | Ken'ichi KARATSU |
4th Author's Affiliation | National Astronomical Observatory of Japan |
5th Author's Name | Yutaro SEKIMOTO |
5th Author's Affiliation | National Astronomical Observatory of Japan |
Date | 2014-01-24 |
Paper # | SCE2013-46 |
Volume (vol) | vol.113 |
Number (no) | 401 |
Page | pp.pp.- |
#Pages | 6 |
Date of Issue |