کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9841798 | 1525798 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Deterministic ratchet effect in asymmetric d.c. SQUIDs
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
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![عکس صفحه اول مقاله: Deterministic ratchet effect in asymmetric d.c. SQUIDs Deterministic ratchet effect in asymmetric d.c. SQUIDs](/preview/png/9841798.png)
چکیده انگلیسی
The dynamical equations for the superconducting phase differences of a conventional d.c. SQUID in the presence of small structural asymmetry and coupling energy inhomogeneity can be studied by means of a reduced two-junction interferometer model. In this context, the resulting dynamics can be described by a single first-order nonlinear differential equation, in which adjustable parameters are present. As a consequence, a ratchet-like potential can be obtained for a convenient choice of parameters. We show, in a zero thermal noise case, that asymmetric d.c. SQUIDs can operate as voltage rectifiers under an external deterministic a.c. signal. Average voltage quantization in the I-V characteristics of the device can be observed as an effect of phase-locking mechanisms. Analytic expressions for the constant voltage steps appearing in the I-V characteristics can be found as a function of the bias current and of the a.c. amplitude of the forcing term.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica C: Superconductivity and its Applications - Volume 424, Issues 3â4, 15 August 2005, Pages 101-106
Journal: Physica C: Superconductivity and its Applications - Volume 424, Issues 3â4, 15 August 2005, Pages 101-106
نویسندگان
F. Romeo, R. De Luca,