Kondo晶格中超导热力学临界场的研究  

INVESTIGATION OF SUPERCONDUCTING THERMODYNAMIC CRITICAL FIELD IN THE KONDO LATTICE

作　　者：陈长风[1] 

机构地区：[1]北京大学物理系

出　　处：《低温物理学报》1989年第1期38-43,共6页Low Temperature Physical Letters

摘　　要：本文在两带准粒子模型下研究了Kondo晶格中超导热力学临界场的行为。我们唯象地引入了准粒子之间的有效吸引相互作用,由系统的两个超导序参量所满足的自洽方程出发计算了超导态与正常态热力学函数之差,由此得到了Kondo晶格中超导热力学临界场的表达式,并结合重费米子超导体CeCu_2Si_2、UBe_(13)和UPt_3的有关实验对所得理论结果进行了讨论。The behavior of superconducting thermodynamic critical field in the Kondo Lattice has been investigated in a two-band quasiparticle model. We have introduced phenomenological-ly the effective attractive interactions between the quasiparticles and calculated the difference of the thermodynamic functions between superconducting and normal state in view of the self-consistent equations of the two superconducting order parameters of the system, and hence obtained the expression for superconducting thermodynamic critical field in the Kondo Lattice. We have also discussed the theoretical results in connection with relevant experiments of the Heavyfermion superconductors CeCu2Si2,UBe10, and UPt2.

关 键 词：超导热力学 临界场 Kondo晶格 

分 类 号：O511.2[理学—低温物理]