2006/03/31 by Katsunori Kubo, Takashi Hotta · 2 citations
Materials Science · Physics and Astronomy · #Antiferromagnetism #Condensed matter physics #Electron #Electronic band structure #Fermi level #Fermi surface #Iron-based superconductors research #Paramagnetism #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Rare-earth and actinide compounds #Superconductivity #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1143/jpsj.75.083702
published as J. Phys. Soc. Jpn. 75, 083702 (2006) · 5 pages, 4 figures
arxiv created 2006/07/25 · openalex publication_date 2006/07/27 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We propose a concept of superconductivity controlled by orbital degree of freedom taking CeMIn5 (M= Co, Rh, and Ir) as typical examples. A microscopic multiorbital model for CeMIn5 is analyzed by fluctuation exchange approximation. Even though the Fermi-surface structure is unchanged, the ground state is found to change significantly among paramagnetic, antiferromagnetic, and d-wave superconducting phases, depending on the dominant orbital component in the band near the Fermi energy. We show that our picture naturally explains the different low-temperature properties of CeMIn5 by carefully analyzing the crystalline electric field states.