Suppression of the critical temperature in homogeneously disordered superconducting films is a consequence of the disorder-induced enhancement of Coulomb repulsion. We demonstrate that for the majority of thin films studied now this effect cannot be completely explained in the assumption of two-dimensional diffusive nature of electrons motion. The main contribution to the T_c suppression arises from the correction to the electron-electron interaction constant coming from small scales of the order of the Fermi wavelength that leads to the critical temperature shift δT_c/T_c0 ∼−1/k_Fl, where k_F is the Fermi momentum and l is the mean free path. Thus almost for all superconducting films that follow the fermionic scenario of T_c suppression with decreasing the film thickness, this effect is caused by the proximity to the three-dimensional Anderson localization threshold and is controlled by the parameter k_Fl rather than the sheet resistance of the film.

均质无序超导薄膜中临界温度的抑制是无序诱导的库仑斥力增强的结果。我们证明，对于现在研究的大多数薄膜，在电子运动的二维扩散性质的假设下，无法完全解释这种效应。所涉及的主要贡献Ť _Ç抑制起因于校正电子-电子相互作用常数从费米波长量级的小尺度来，导致临界温度换档δT _Ç / Ť _{ç 0}〜-1 / ķ _˚F升，其中k _F是费米动量，l是平均自由路径。因此几乎用于跟随的费米子场景所有超导膜Ť _Ç抑制与降低的膜厚度，该效果是由接近三维安德森局部化阈引起和由参数控制ķ _˚F升而不是片材电阻电影的