.png){kind=icon}
.png){kind=icon}
Return
Pair-breaking effect on mesoscopic persistent currents
.png){kind=icon}
OA
AI
DOI：10.1103/PhysRevB.80.024509.png)
.png){kind=icon}
.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
We consider the contribution of superconducting fluctuations in the mesoscopic persistent current (PC) of an ensemble of normal metallic rings, made of a superconducting material whose low bare transition temperature T(c)(0) is much smaller than the Thouless energy E(c). The effect of pair breaking is introduced via the example of magnetic impurities. We find that over a rather broad range of pair-breaking strength h/tau(s), such that T(c)(0)less than or similar to h/tau(s)less than or similar to E(c), the superconducting transition temperature is normalized down to minute values or zero while the PC is hardly affected. This may provide an explanation for the magnitude of the average PCs in copper and gold as well as a way to determine their T(c)(0)'s. The dependence of the current and the dominant superconducting fluctuations on E(c)tau(s) and on the ratio between E(c) and the temperature is analyzed. The measured PCs in copper (gold) correspond to T(c)(0) of a few (a fraction of) mK. .
Keywords:
Cooper pairs
fluctuations in superconductors
superconducting materials
superconducting transition temperature
AI Summary
Key information extracted from the uploaded paper, including a brief overview, abstract, background, key highlights, visual analysis, and future outlook.
Journal
IF:
3.7
Papers:
15.4W
Citations:
41.0W