Pressure-Induced Collapse of Valence Order and Emergence of Quantum Valence Fluctuation in YbPd

Akihiro Mitsuda; Kohei Oyama; Hirofumi Wada; Naohisa Hirao; Saori Kawaguchi; Yasuo Ohishi; Jun Gouchi; Yoshiya Uwatoko

doi:10.4131/jshpreview.32.20

Pressure-Induced Collapse of Valence Order and Emergence of Quantum Valence Fluctuation in YbPd

Akihiro Mitsuda, Kohei Oyama, Hirofumi Wada, Naohisa Hirao, Saori Kawaguchi, Yasuo Ohishi, Jun Gouchi, Yoshiya Uwatoko

Condensed Matter Physics

Research output: Contribution to journal › Review article › peer-review

Abstract

To clarify a high-pressure cubic valence fluctuating ground state of YbPd appearing after collapse of valence order, powder X-ray diffraction and electrical resistivity under high pressures were measured at low temperatures. Tracing splitting of a (4 0 0) Bragg peak manifests that the structural phase transition into a tetragonal symmetry is shifted linearly to 20 K at P = 4.4 GPa and is suppressed at P = 5.0 GPa. The resistivity measurements reveal non-Fermi liquid (NFL) behavior and no emergence of new magnetic order. The resistivity exhibits T-linear dependence above 8 GPa, which corresponds to quantum valence fluctuation.

Original language	English
Pages (from-to)	20-26
Number of pages	7
Journal	Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu
Volume	32
Issue number	1
DOIs	https://doi.org/10.4131/jshpreview.32.20
Publication status	Published - 2022

All Science Journal Classification (ASJC) codes

General Chemistry
General Materials Science
Condensed Matter Physics

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title = "Pressure-Induced Collapse of Valence Order and Emergence of Quantum Valence Fluctuation in YbPd",

abstract = "To clarify a high-pressure cubic valence fluctuating ground state of YbPd appearing after collapse of valence order, powder X-ray diffraction and electrical resistivity under high pressures were measured at low temperatures. Tracing splitting of a (4 0 0) Bragg peak manifests that the structural phase transition into a tetragonal symmetry is shifted linearly to 20 K at P = 4.4 GPa and is suppressed at P = 5.0 GPa. The resistivity measurements reveal non-Fermi liquid (NFL) behavior and no emergence of new magnetic order. The resistivity exhibits T-linear dependence above 8 GPa, which corresponds to quantum valence fluctuation.",

author = "Akihiro Mitsuda and Kohei Oyama and Hirofumi Wada and Naohisa Hirao and Saori Kawaguchi and Yasuo Ohishi and Jun Gouchi and Yoshiya Uwatoko",

year = "2022",

doi = "10.4131/jshpreview.32.20",

language = "English",

volume = "32",

pages = "20--26",

journal = "Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu",

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T1 - Pressure-Induced Collapse of Valence Order and Emergence of Quantum Valence Fluctuation in YbPd

AU - Mitsuda, Akihiro

AU - Oyama, Kohei

AU - Wada, Hirofumi

AU - Hirao, Naohisa

AU - Kawaguchi, Saori

AU - Ohishi, Yasuo

AU - Gouchi, Jun

AU - Uwatoko, Yoshiya

PY - 2022

Y1 - 2022

N2 - To clarify a high-pressure cubic valence fluctuating ground state of YbPd appearing after collapse of valence order, powder X-ray diffraction and electrical resistivity under high pressures were measured at low temperatures. Tracing splitting of a (4 0 0) Bragg peak manifests that the structural phase transition into a tetragonal symmetry is shifted linearly to 20 K at P = 4.4 GPa and is suppressed at P = 5.0 GPa. The resistivity measurements reveal non-Fermi liquid (NFL) behavior and no emergence of new magnetic order. The resistivity exhibits T-linear dependence above 8 GPa, which corresponds to quantum valence fluctuation.

AB - To clarify a high-pressure cubic valence fluctuating ground state of YbPd appearing after collapse of valence order, powder X-ray diffraction and electrical resistivity under high pressures were measured at low temperatures. Tracing splitting of a (4 0 0) Bragg peak manifests that the structural phase transition into a tetragonal symmetry is shifted linearly to 20 K at P = 4.4 GPa and is suppressed at P = 5.0 GPa. The resistivity measurements reveal non-Fermi liquid (NFL) behavior and no emergence of new magnetic order. The resistivity exhibits T-linear dependence above 8 GPa, which corresponds to quantum valence fluctuation.

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JO - Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu

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Pressure-Induced Collapse of Valence Order and Emergence of Quantum Valence Fluctuation in YbPd

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