Superconductivity of 2D system with arbitrary carrier density in external magnetic field

摘要

Self consistent equations which describe the order parameter and chemical potential behaviour in 2D metallic system as functions of external magnetic field, H, temperature, T, and carrier density, n, are obtained. It is shown that for the case of the local pairs (low carrier density and negative chemical potential mu) the derivative dH(sub c(sub 2))(T)/dT at T=T(sub c) is essentially less then that for the system with Cooper pairs (high carrier density and positive chemical potential mu >>T(sub c)). It is found that in magnetic field satisfying the quantum limit criterium the system is characterized by non-trivial inhomogeneous order parameter which can exist at rather high temperatures. 16 refs. (Atomindex citation 28:011583)