A Self-Consistent Theory of the Pair Fluctuations in the Two-Dimensional Fermi Superfluidity

抄録

Cooper pairing in two dimensions is discussed with emphasis on the effect of the mode-mode coupling of the pair fluctuations. Extending the Nozières and Schmitt-Rink theory so as to take into account the repulsion among pair fluctuations, the transition temperature T_c and the chemical potential μ are determined self-consistently, giving the solution T_c=0 and μ\simeqε_F in the limit of weak attraction among constituent fermions. It is essential to take into account the screening effect of the long-range repulsive interaction among the pair fluctuations.