Temperature-Dependent Change of Correlated Electronic States in Yb4As3 and Yb4(As1-xSbx)3 Probed by High Resolution Photoemission Spectroscopy

Shigemasa Suga, Akira Ochiai, Takashi Suzuki, Hideyuki Harada, Akira Sekiyama, Tomohiro Matsushita, Takeshi Iwasaki, Akio Kimura, Masanori Tsunekawa, Takayuki Muro, Shigenori Ueda, Hiroshi Daimon, Shin Imada, Hirofumi Namatame, Masaki Taniguchi, Hiroyoshi Ishii, Tsuneaki Miyahara, Takaaki Hanyu, Atsushi Fujimori

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Clear changes of the Yb 4f photoemission spectra with temperature are observed in Yb4As3 by high resolution photoemission spectroscopy. The photoemission intensity is very low at the Fermi level and decreases as the temperature is lowered in accord with the narrowing of the 4f spectra. Bulk and surface contributions are deconvoluted in the 4f13 final state spectra. In comparison with the corresponding results in Yb4(As1-xSbx)3, the spectral changes of Yb4As3 with temperature are confirmed to be beyond simple thermal broadening effects and related to the charge ordering effects. Although the change from the charge ordering temperature (Tt) down to about Tt/2 is consistent with a theoretical prediction, the change below it is rather unusual and may be ascribed to the incompleteness of the charge ordering effect. Spectral changes with Yb4Sb3-substitution are qualitatively discussed.

Original languageEnglish
Pages (from-to)3552-3560
Number of pages9
Journaljournal of the physical society of japan
Volume67
Issue number10
DOIs
Publication statusPublished - 1998 Oct
Externally publishedYes

Keywords

  • 4f electron
  • Charge ordering
  • Correlated band
  • Heavy fermion
  • Long chain
  • Short chain
  • Structural phase transition

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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