Theory of Coupled Multipole Moments Probed by X-ray Scattering in CeB${}_6$

Abstract

A minimal model for multipole orders in CeB${}_6$ shows that degeneracy of the quadrupole order parameters and strong spin-orbit coupling lead to peculiar temperature and magnetic-field dependences of the X-ray reflection intensity at superlattice Bragg points. Furthermore, the intensity depends sensitively on the surface direction. These theoretical results explain naturally recent X-ray experiments in phases II and III of CeB${}_6$. It is predicted that under weak magnetic field perpendicular to the (111) surface, the reflection intensity should change non-monotonically as a function of temperature.

4 pages, 5 figures

References in corpus (2)

• Antiferro-quadrupole Ordering of CeB${}_6$ Studied by Resonant X-ray Scattering
• Non-Collinear Magnetism due to Orbital Degeneracy and Multipolar Interactions

Cited by in corpus (2)

• Determining the crystal-field ground state in rare earth Heavy Fermion materials using soft-x-ray absorption spectroscopy
• Studies on X-ray Thomson Scattering from Antiferroquadrupolar Order in TmTe