2002/04/30 by Takahiro Takimoto, Tetsuya Takimoto, Takashi Hotta +3
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1088/0953-8984/14/21/101
published as J. Phys.: Condens. Matter 14, L369-L375 (2002) · 4 pages, 3 figures
openalex publication_date 2002/05/17 · arxiv created 2002/11/27 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
A microscopic Hamiltonian reflecting the correct symmetry of f orbitals is proposed for discussing superconductivity in heavy-fermion systems. In the orbitally degenerate region in which not only spin fluctuations (SF) but also orbital fluctuations (OF) show considerable development, cancellation between SF and OF destabilizes the d x 2 - y 2 -wave superconductivity. On entering the non-degenerate region by increasing the crystalline electric field, d x 2 - y 2 -wave superconductivity mediated by antiferromagnetic SF emerges from the suppression of OF. We argue that the present scenario can be applied to the recently discovered superconductors CeTIn 5 (T = Ir, Rh, and Co).