Intermediate-valence quasicrystals of Yb-based alloys under pressure

Tetsu Watanuki; Daichi Kawana; Akihiko Machida; Ampo Sai

doi:10.1143/JPSJS.80SA.SA087

Intermediate-valence quasicrystals of Yb-based alloys under pressure

Tetsu Watanuki, Daichi Kawana, Akihiko Machida, Ampo Sai

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

A quasiperiodic intermediate-valence system is demonstrated by applying pressure to an icosahedral Cd-Mg-Yb quasicrystal as well as our previous report on a Cd-Yb quasicrystal [Phys. Rev. B 81 (2010) 220202(R)]. Yb L _III-edge x-ray absorption spectroscopy experiments demonstrate that the Yb valence increases continuously upon compression from the divalent state at ambient pressure, and reaches a valence of 2.37 at 16.3 GPa. Unlike other known quasicrystals, these Yb-based quasiperiodic intermediate-valence systems have the following two characteristics. 1) Each quasiperiodic lattice point has a charge degree of freedom, and 2) pressure can control the strength of the electron correlations.

Original language	English
Article number	SA087
Journal	journal of the physical society of japan
Volume	80
Issue number	SUPPL. A
DOIs	https://doi.org/10.1143/JPSJS.80SA.SA087
Publication status	Published - 2011 Jul 1

Keywords

High pressure
Intermediate valence
Quasicrystal
X-ray absorption spectroscopy

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1143/JPSJS.80SA.SA087

Cite this

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abstract = "A quasiperiodic intermediate-valence system is demonstrated by applying pressure to an icosahedral Cd-Mg-Yb quasicrystal as well as our previous report on a Cd-Yb quasicrystal [Phys. Rev. B 81 (2010) 220202(R)]. Yb L III-edge x-ray absorption spectroscopy experiments demonstrate that the Yb valence increases continuously upon compression from the divalent state at ambient pressure, and reaches a valence of 2.37 at 16.3 GPa. Unlike other known quasicrystals, these Yb-based quasiperiodic intermediate-valence systems have the following two characteristics. 1) Each quasiperiodic lattice point has a charge degree of freedom, and 2) pressure can control the strength of the electron correlations.",

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AU - Watanuki, Tetsu

AU - Kawana, Daichi

AU - Machida, Akihiko

AU - Sai, Ampo

PY - 2011/7/1

Y1 - 2011/7/1

N2 - A quasiperiodic intermediate-valence system is demonstrated by applying pressure to an icosahedral Cd-Mg-Yb quasicrystal as well as our previous report on a Cd-Yb quasicrystal [Phys. Rev. B 81 (2010) 220202(R)]. Yb L III-edge x-ray absorption spectroscopy experiments demonstrate that the Yb valence increases continuously upon compression from the divalent state at ambient pressure, and reaches a valence of 2.37 at 16.3 GPa. Unlike other known quasicrystals, these Yb-based quasiperiodic intermediate-valence systems have the following two characteristics. 1) Each quasiperiodic lattice point has a charge degree of freedom, and 2) pressure can control the strength of the electron correlations.

AB - A quasiperiodic intermediate-valence system is demonstrated by applying pressure to an icosahedral Cd-Mg-Yb quasicrystal as well as our previous report on a Cd-Yb quasicrystal [Phys. Rev. B 81 (2010) 220202(R)]. Yb L III-edge x-ray absorption spectroscopy experiments demonstrate that the Yb valence increases continuously upon compression from the divalent state at ambient pressure, and reaches a valence of 2.37 at 16.3 GPa. Unlike other known quasicrystals, these Yb-based quasiperiodic intermediate-valence systems have the following two characteristics. 1) Each quasiperiodic lattice point has a charge degree of freedom, and 2) pressure can control the strength of the electron correlations.

KW - High pressure

KW - Intermediate valence

KW - Quasicrystal

KW - X-ray absorption spectroscopy

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Intermediate-valence quasicrystals of Yb-based alloys under pressure

Abstract

Keywords

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