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arXiv 0804.0702cond-mat.mes-hallcond-mat.supr-con
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超导体transition temperature上方对破缺对介观持续电流的影响

Effect of pair-breaking on mesoscopic persistent currents well above the superconducting transition temperature

H. Bary-Soroker, O. Entin-Wohlman, Y. Imry

摘要:

本文研究了裸转变温度$T_c^0$远小于无介观能量$E_c$的超低温超导体中的介观正常持续电流(PC)。我们表明,在一个相当广泛的范围内的成对断裂强度,$T_c^0 \lesssim \hbar/τ_s \lesssim E_c$,转变温度重整化为零,但PC几乎不受影响。这可以解释贵金属中平均PC的大小,以及确定其$T_c^0$的方法。

英文摘要:

We consider the mesoscopic normal persistent current (PC) in a very low-temperature superconductor with a bare transition temperature $T_c^0$ much smaller than the Thouless energy $E_c$. We show that in a rather broad range of pair-breaking strength, $T_c^0 \lesssim \hbar/τ_s \lesssim E_c$, the transition temperature is renormalized to zero, but the PC is hardly affected. This may provide an explanation for the magnitude of the average PC's in the noble metals, as well as a way to determine their $T_c^0$'s.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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