Phase Slip in Mesoscopic Charge-Density-Wave Systems
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概要
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Collective electron transport in mesoscopic charge-density-wave (CDW) systems is studied theoretically. Sliding motion of the CDW is accompanied by thermally activated phase-slip processes near electrical contacts. Each phase-slip event gives rise to an addition or removal of a wavefront, resulting in deformation of the overall phase profile. Since the energy barrier for thermal nucleation of phase-slip centers strongly depends on the phase profile, its deformation affects the phase-slip rate, particularly in small samples. We calculate the nonlinear behavior between the CDW current and the phase-slip voltage Vps, taking account of the small-size effect on the phase-slip rate. Using the parameters for NbSe3, we find that the small-size effect reduces Vps when the sample length is smaller than a few micrometers. This behavior is consistent with the recent experiment by Mantel et al.: Phys. Rev. Lett. 84 (2000) 538 for mesoscopic NbSe3 wires.
- Physical Society of Japanの論文
- 2001-07-15
著者
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Wakabayashi Katsunori
Department Of Physical Electronics Hiroshima University
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Takane Yositake
Department Of Applied Physics Osaka City University
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Wakabayashi Katsunori
Department of Physical Electronics, Hiroshima University, Higashi-Hiroshima 739-8527
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