Octupole moment as a hidden order parameter in orbitally degenerate f-electron systems

Yoshio Kuramoto, Hiroaki Kusunose

Research output: Contribution to journalArticlepeer-review

44 Citations (Scopus)

Abstract

Possibility of a novel pseudoscalar (octupole) order is studied theoretically for orbitally degenerate systems with strong spin-orbit coupling such as CexLa1-xB6. We argue that coexistence of an octupole order parameter and antiferromagnetic fluctuation should lead to marked softening of the elastic constant by a mode-mixing effect. Nonlinear coupling between dipole, quadrupole and octupole fluctuations is taken into account in terms of a Ginzburg-Landau-type functional which is derived microscopically through a path integral.

Original languageEnglish
Pages (from-to)671-674
Number of pages4
Journaljournal of the physical society of japan
Volume69
Issue number3
DOIs
Publication statusPublished - 2000 Mar

Keywords

  • CeLaB
  • Elastic constant
  • Multipole
  • Octupole moment
  • Orbital degeneracy
  • Time reversal
  • Ultrasound

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Octupole moment as a hidden order parameter in orbitally degenerate f-electron systems'. Together they form a unique fingerprint.

Cite this