Temperature dependence of the Yb 4f spectra in Yb4Bi3 probed by photoemission spectroscopy

Hideyuki Harada, Akira Sekiyama, Shigemasa Suga, Shin Imada, Takayuki Muro, Ran Ju Jung, Kyoko Matsuda, Hiroshi Takagi, Akira Ochiai, Takashi Suzuki, Hisatomo Harima

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We have performed a photoemission study of Yb4Bi3. The valence band spectra have shown no multiplet structures associated with the trivalent Yb and revealed that the mean valence of the Yb ion is very close to 2.0. The divalent Yb 4f spectra have shown strong surface components besides weak but sharp bulk components. The surface 4f level shift is about 0.45 eV (300K), 0.48 eV (150K) and 0.54 eV (20K). A clear energy shift of the bulk Yb 4f peaks toward EF with decreasing temperature has been observed, although Yb4Bi3 shows neither phase transition nor crossover. Such an unusual peak shift of the bulk component may originate from a change of the lattice constant with decreasing temperature. The observed narrowing of the bulk 4f peaks is thought to be due to a phonon broadening (∼7kBT).

Original languageEnglish
Pages (from-to)2844-2847
Number of pages4
Journaljournal of the physical society of japan
Volume68
Issue number8
DOIs
Publication statusPublished - 1999 Aug
Externally publishedYes

Keywords

  • Peak shift
  • Phonon broadening
  • Photoemission
  • YbBi
  • p-f mixing

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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