Multipole ordering in f-electron systems

Abstract

In order to investigate multipole ordering in f-electron systems from a microscopic viewpoint, we study the so-called Γ_8 models on three kinds of lattices, simple cubic (sc), bcc, and fcc, based on a j-j coupling scheme with f-electron hopping integrals through (ffσ) bonding. From the Γ_8 model, we derive an effective model for each lattice structure by using the second-order perturbation theory with respect to (ffσ). By further applying mean-field theory to the effective model, we find a Γ_{3g} antiferro-quadrupole transition for the sc lattice, a Γ_{2u} antiferro-octupole transition for the bcc lattice, and a longitudinal triple-q Γ_{5u} octupole transition for the fcc lattice.

2 pages, 3 figures

References in corpus (7)

• Triple-q octupolar ordering in NpO_2
• Construction of microscopic model for f-electron systems on the basis of j-j coupling scheme
• Octupole Ordering Model for the Phase IV of CexLa1-xB6
• Microscopic theory of multipole ordering in NpO2
• Non-Collinear Magnetism due to Orbital Degeneracy and Multipolar Interactions
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• Lattice Distortion and Octupole Ordering Model in CexLa1-xB6

Cited by in corpus (5)

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• Octupolar edge state in an $e_g$ orbital system on a square lattice
• Flat Surface State with Octupole Moment in an $e_g$ Orbital System on a Simple Cubic Lattice