Home » 学术转发 » 名词 » 近邻效应 Proximity effect

近邻效应 Proximity effect

A given material can be transformed through proximity effects whereby it acquires properties of its neighbors, for example, becoming superconducting, magnetic, topologically nontrivial, or with an enhanced spin–orbit coupling. Such proximity effects not only complement the conventional methods of designing materials by doping or functionalization but also can overcome their various limitations. In proximitized materials, it is possible to realize properties that are not present in any constituent region of the considered heterostructure.

参考资料:

Proximitized materials (https://doi.org/10.1016/j.mattod.2018.05.003)

Proximity effect or Holm–Meissner effect is a term used in the field of superconductivity to describe phenomena that occur when a superconductor (S) is placed in contact with a "normal" (N) non-superconductor. Typically the critical temperature T_{c} of the superconductor is suppressed and signs of weak superconductivity are observed in the normal material over mesoscopic distances. The proximity effect is known since the pioneering work by R. Holm and W. Meissner. They have observed zero resistance in SNS pressed contacts, in which two superconducting metals are separated by a thin film of a non-superconducting (i.e. normal) metal. The discovery of the supercurrent in SNS contacts is sometimes mistakenly attributed to Brian Josephson's 1962 work, yet the effect was known long before his publication and was understood as the proximity effect.

参考资料:

https://en.wikipedia.org/wiki/Proximity_effect_(superconductivity)

11 次浏览
FavoriteLoading加入收藏

作者归档

文章分类

最近发布(原创文章+学术转发)

最近发布(其他转发+默认分类)