کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1817890 | 1525722 | 2013 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Prediction of unexpected behavior of the mean inner potential of superconductors Prediction of unexpected behavior of the mean inner potential of superconductors](/preview/png/1817890.png)
• Superconductors are predicted to expel electrons from their interior to the surface.
• This would result in a mean inner potential that increases with sample thickness.
• It is proposed that electron holography can detect this unexpected effect.
• If verified, it would change the understanding of superconductivity.
Off-axis electron holography can measure the mean inner electric potential of materials. The theory of hole superconductivity predicts that when a material is cooled into the superconducting state it expels electrons from its interior to the surface, giving rise to a mean inner potential that increases with sample thickness. Instead, in a normal metal and in a conventional BCS superconductor the mean inner potential is expected to be independent of sample thickness and temperature. Thus, this experiment can provide a definitive test of the validity of the theory of hole superconductivity.
Journal: Physica C: Superconductivity - Volume 490, 15 July 2013, Pages 1–4