Parity-fluctuation induced enlargement of the ratio Delta(E)/k(B)T(c) in metallic grains

作者：Croitoru M D^*; Shanenko A A; Peeters F M; Axt V M

来源：Physical Review B, 2011, 84(21): 214518.

DOI：10.1103/PhysRevB.84.214518

We investigate how the interplay of quantum confinement and particle number-parity fluctuations affects superconducting correlations in ultra-small metallic grains. Using the number-parity projected BCS formalism we calculate the critical temperature and the excitation gap as a function of the grain size for grains with even and odd number of confined carriers. We show that the experimentally obs

• 出版日期2011-12-15