Rattling motion in β-pyrochlore compounds explored by the millimeter-wave conductivity measurement

Atsutaka Maeda; Kentaro Oba; Yoshinori Imai; Jun Ichi Yamaura; Zenji Hiroi

doi:10.1016/j.physc.2009.11.102

Rattling motion in β-pyrochlore compounds explored by the millimeter-wave conductivity measurement

Atsutaka Maeda, Kentaro Oba, Yoshinori Imai, Jun Ichi Yamaura, Zenji Hiroi

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

Abstract

Complex conductivity is investigated at 19 GHz and 44 GHz in the normal state in β-pyrochlore materials, AOs₂O₆ (A = Cs, Rb and K). In Cs material, large enhancement of the quasiparticle (QP) scattering time, τ, is observed at low temperatures, whereas there is no such enhancement in Rb and K materials. This indicates that rattling motion is absent in Cs material, whether in K and Rb materials it plays the role as a scatterer for QPs. In Rb materials, we find charge excitation possibly originated from the rattling motion.

Original language	English
Journal	Physica C: Superconductivity and its applications
Volume	470
Issue number	SUPPL.1
DOIs	https://doi.org/10.1016/j.physc.2009.11.102
Publication status	Published - 2010 Dec 1
Externally published	Yes

Keywords

Cavity perturbation
Millimeter-wave conductivity
Rattling
Superconductivity
β-Pyrochlore compounds

ASJC Scopus subject areas

Condensed Matter Physics
Electrical and Electronic Engineering
Energy Engineering and Power Technology
Electronic, Optical and Magnetic Materials

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10.1016/j.physc.2009.11.102

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title = "Rattling motion in β-pyrochlore compounds explored by the millimeter-wave conductivity measurement",

abstract = "Complex conductivity is investigated at 19 GHz and 44 GHz in the normal state in β-pyrochlore materials, AOs2O6 (A = Cs, Rb and K). In Cs material, large enhancement of the quasiparticle (QP) scattering time, τ, is observed at low temperatures, whereas there is no such enhancement in Rb and K materials. This indicates that rattling motion is absent in Cs material, whether in K and Rb materials it plays the role as a scatterer for QPs. In Rb materials, we find charge excitation possibly originated from the rattling motion.",

keywords = "Cavity perturbation, Millimeter-wave conductivity, Rattling, Superconductivity, β-Pyrochlore compounds",

author = "Atsutaka Maeda and Kentaro Oba and Yoshinori Imai and Yamaura, {Jun Ichi} and Zenji Hiroi",

year = "2010",

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journal = "Physica C: Superconductivity and its Applications",

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T1 - Rattling motion in β-pyrochlore compounds explored by the millimeter-wave conductivity measurement

AU - Maeda, Atsutaka

AU - Oba, Kentaro

AU - Imai, Yoshinori

AU - Yamaura, Jun Ichi

AU - Hiroi, Zenji

PY - 2010/12/1

Y1 - 2010/12/1

N2 - Complex conductivity is investigated at 19 GHz and 44 GHz in the normal state in β-pyrochlore materials, AOs2O6 (A = Cs, Rb and K). In Cs material, large enhancement of the quasiparticle (QP) scattering time, τ, is observed at low temperatures, whereas there is no such enhancement in Rb and K materials. This indicates that rattling motion is absent in Cs material, whether in K and Rb materials it plays the role as a scatterer for QPs. In Rb materials, we find charge excitation possibly originated from the rattling motion.

AB - Complex conductivity is investigated at 19 GHz and 44 GHz in the normal state in β-pyrochlore materials, AOs2O6 (A = Cs, Rb and K). In Cs material, large enhancement of the quasiparticle (QP) scattering time, τ, is observed at low temperatures, whereas there is no such enhancement in Rb and K materials. This indicates that rattling motion is absent in Cs material, whether in K and Rb materials it plays the role as a scatterer for QPs. In Rb materials, we find charge excitation possibly originated from the rattling motion.

KW - Cavity perturbation

KW - Millimeter-wave conductivity

KW - Rattling

KW - Superconductivity

KW - β-Pyrochlore compounds

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JO - Physica C: Superconductivity and its Applications

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SN - 0921-4534

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ER -

Rattling motion in β-pyrochlore compounds explored by the millimeter-wave conductivity measurement

Abstract

Keywords

ASJC Scopus subject areas

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