自旋密度波对有次近邻互作用超导体的影响

The Effect of Spin Density Wave on 2+1 Dimensional BCS-type Superconductors with the Next Nearest Neighbor Interaction

本文研究具有次近邻互作用的2+1维BCS型超导体与自旋密度波共存的系统。在平均场近似下,应用含温度格林函数方法讨论自旋密度波序参量M对超导相变温度Tc的影响。计算表明不可能出现自旅密度波提高Tc的情况,而当M较大时,往往破坏超导电性。

The effect of spin density wave on 2+1 dimensional BCS-type super-conductors with the next nearest neighbor interaction is investigated with themean-field approximation. By using the temperature Green function we found thatthe presence of the spin density wave does not enhance superconducting transitiontemperature whereas the superconductivity is destroyed for a large spin densitywave order parameter M.