Intermediate-valence quasicrystal of a Cd-Yb alloy under pressure

Daichi Kawana, Tetsu Watanuki, Akihiko MacHida, Takahisa Shobu, Katsutoshi Aoki, Ampo Sai

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

A quasiperiodic intermediate-valence system was prepared by applying pressure to an icosahedral Cd-Yb quasicrystal. In this system, each quasiperiodic lattice point has a charge degree of freedom. Yb LIII x-ray absorption spectroscopy experiments demonstrate that the Yb valence increases continuously upon compression from a divalent state at ambient pressure and reaches 2.33 at 31.7 GPa. A comparison study to the crystalline approximant suggests that the quasiperiodically arranged Yb ions have a homogeneous intermediate valence that takes a valence fluctuation state under pressure.

Original languageEnglish
Article number220202
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume81
Issue number22
DOIs
Publication statusPublished - 2010 Jun 25

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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