Effect of hybridization and dispersion of quasiparticles on the coexistent state of superconductivity and antiferromagnetism in 𝑅Ni2B2C

Pramana

B N Panda¹  B K Sahoo1² 

[1] Department of Physics, K.K. Junior College, Berhampur 760 001, India$$;Department of Physics, D.A.V. College, Koraput 764 021, India$$

关键词: Borocarbides;    antiferromagnetic;    BCS theory;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

The effect of hybridization of conduction electrons and f-level on superconductivity (SC) and antiferromagnetism (AFM) in the coexistent phase of rare-earth nickel borocarbide superconductors (𝑅Ni2B2C) is reported. The Hamiltonian of the system is a mean field one and has been solved by writing equations of motion for the single-particle Green functions. It is assumed that superconductivity arises due to BCS pairing mechanism in the presence of antiferromagnetism in nickel lattices of Ni2B2 plane. The expressions for superconducting and antiferromagnetic order parameters are derived using double time electron Green functions. The quasiparticle energy bands are plotted and the nature of band dispersion of the quasiparticles is studied.

【 授权许可】

Unknown