安德烈夫反射(Andreev reflection)是描述一个电子入射超导体(S)和正常金属(N)之现象，是由俄国物理学家亚历山大·F·安德烈夫首度发现。当电子过入射超导体和正常金属之间时，在正常金属这边会形成一一个与之前入射电子自旋相反的电洞，而在超导体的另一边会形成一个库柏对(两个自旋不同电子纠缠在一起状态) 所谓正常金属, 这里指在费米面附近, 相反自旋态密度相同的金属.

Andreev reflection (AR), named after the Russian physicist Alexander F. Andreev, is a type of particle scattering which occurs at interfaces between a superconductor (S) and a normal state material (N). It is a charge-transfer process by which normal current in N is converted to supercurrent in S. Each Andreev reflection transfers a charge 2e across the interface, avoiding the forbidden single-particle transmission within the superconducting energy gap.