Volume 118, Number 4, May 2017
|Number of page(s)||7|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||20 July 2017|
Two-orbital model for CeB6
Harish-Chandra Research Institute - Chhatnag Road, Jhunsi, Allahabad 211019, India and Homi Bhabha National Institute, Training School Complex - Anushakti Nagar, Mumbai 400085, India
Received: 17 April 2017
Accepted: 3 July 2017
We describe a two-orbital tight-binding model with bases belonging to the Γ8 quartet. It captures several characteristics of the Fermiology unravelled by the recent angle-resolved photoemission spectroscopic (ARPES) measurements on cerium hexaboride CeB6 samples cleaved along different high-symmetry crystallographic directions, which includes the ellipsoid-like Fermi surfaces (FSs) with major axes directed along Γ-X. We calculate various multipolar susceptibilities within the model and identify the susceptibility that shows the strongest divergence in the presence of standard onsite Coulomb interactions and discuss its possible implication and relevance with regard to the signature of strong ferromagnetic correlations existent in various phases as shown by the recent experiments.
PACS: 71.27.+a – Strongly correlated electron systems; heavy fermions / 75.25.Dk – Orbital, charge, and other orders, including coupling of these orders / 75.10.Lp – Band and itinerant models
© EPLA, 2017
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