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題 名 | New Findings of the Electromagnetic Response in Superconductors |
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作 者 | Mou,C. Y.; Chang,D.; Rosenstein,B.; Wu,C. L.; | 書刊名 | Chinese Journal of Physics |
卷 期 | 36:2(Part2) 民87.04 |
頁 次 | 頁180-189 |
分類號 | 337.473 |
關鍵詞 | 超導體; |
語 文 | 英文(English) |
英文摘要 | Based on the Ginzburg-Landau theory, two theoretical findings in the electromagnetic response of superconductors are described. First, we derive the most general linear response theory and then apply it to the charged super fluid regime, where the magnetic fluctuation is relevant. In particular, we show that a novel effect arises, in which the divergence of the conductivity tensor is suppressed by the diamagnetic susceptibilities. Secondly, we show that because of the approximated fourfold symmetry of the crystal lattice in high Tc cuprates, a non-vanishing Hall current can arise near Hc₂.This Hall current is non-linear and can become large to be observed if the applied electric field is large enough. |
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