التفاصيل البيبلوغرافية
| العنوان: |
A THz time-domain susceptibility for superconductors including strong-current effects. |
| المؤلفون: |
Xi, Xiaoxiang, Carr, G L |
| المصدر: |
Superconductor Science & Technology; Nov2013, Vol. 26 Issue 11, p114001-114007, 7p |
| مصطلحات موضوعية: |
SUPERCONDUCTORS, FINITE difference time domain method, DIELECTRICS, ELECTROMAGNETIC wave propagation, DRUDE theory, TERAHERTZ technology |
| مستخلص: |
Finite-difference time-domain methods are increasingly being used to develop, model and analyze the response of materials, including engineered metamaterials that may contain superconductors. Though simple and useful expressions for the time-domain susceptibility exist for basic metals and dielectrics, the time-domain response for a superconductor has not been developed, mainly because the frequency-dependent expressions themselves are rather complex. In this paper we present a simple approximate expression for the time-domain susceptibility of a superconductor for the ħ/2Δ time scale (where Δ is the BCS energy gap) that fulfils causality requirements, and demonstrate its ability to model the transmission and reflection of a fully-gapped superconductor in the THz region. By allowing Δ to be a function of current, we also show how this model function can be used to describe nonlinear microwave response in superconductors. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
