Quantum valence criticality in a correlated metal

被引：24

作者：

Kuga, Kentaro ^{[1
,2
]}

Matsumoto, Yosuke ^{[1
,10
]}

Okawa, Mario ^{[1
]}

Suzuki, Shintaro ^{[1
]}

Tomita, Takahiro ^{[1
]}

Sone, Keita ^{[1
]}

Shimura, Yasuyuki ^{[1
,11
]}

Sakakibara, Toshiro ^{[1
]}

Nishio-Hamane, Daisuke ^{[1
]}

Karaki, Yoshitomo ^{[1
,3
]}

Takata, Yasutaka ^{[2
]}

Matsunami, Masaharu ^{[4
,5
]}

Eguchi, Ritsuko ^{[6
]}

Taguchi, Munetaka ^{[2
]}

Chainani, Ashish ^{[2
,7
]}

Shin, Shik ^{[1
,2
]}

Tamasaku, Kenji ^{[2
]}

Nishino, Yoshinori ^{[2
,8
]}

Yabashi, Makina ^{[2
]}

Ishikawa, Tetsuya ^{[2
]}

Nakatsuji, Satoru ^{[1
,9
]}

机构：

[1] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

[2] RIKEN SPring 8 Ctr, Mikazuki, Hyogo 6795148, Japan

[3] Univ Ryukyus, Fac Educ, Nishihara, Okinawa 9030213, Japan

[4] Inst Mol Sci, Ultraviolet Synchrotron Orbital Radiat Facil, Okazaki, Aichi 4448585, Japan

[5] Grad Univ Adv Studies, Okazaki, Aichi 4448585, Japan

[6] Okayama Univ, Res Lab Surface Sci, Okayama 7008530, Japan

[7] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan

[8] Hokkaido Univ, Res Inst Elect Sci, Sapporo, Hokkaido 0010021, Japan

[9] Japan Sci & Technol Agcy, Core Res Evolutionary Sci & Technol, Chiyoda Ku, Tokyo 1020076, Japan

[10] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany

[11] Hiroshima Univ, Grad Sch Adv Sci Matter, Higashihiroshima 7398530, Japan

来源：

SCIENCE ADVANCES | 2018年 / 4卷 / 02期

基金：

日本科学技术振兴机构;

关键词：

X-RAY PHOTOEMISSION; HEAVY-FERMION; CROSSOVER; STATE; LINE;

D O I：

10.1126/sciadv.aao3547

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

A valence critical end point existing near the absolute zero provides a unique case for the study of a quantum version of the strong density fluctuation at the Widom line in the supercritical fluids. Although singular charge and orbital dynamics are suggested theoretically to alter the electronic structure significantly, breaking down the standard quasi-particle picture, this has never been confirmed experimentally to date. We provide the first empirical evidence that the proximity to quantum valence criticality leads to a clear breakdown of Fermi liquid behavior. Our detailed study of the mixed valence compound alpha-YbAlB4 reveals that a small chemical substitution induces a sharp valence crossover, accompanied by a pronounced non-Fermi liquid behavior characterized by a divergent effective mass and unusual T/B scaling in the magnetization.

引用

页数：6

共 49 条

[1] [Anonymous], 1985, Springer Series in Solid-State Sciences
[2] Arai Y., 2002, SPR S MAT PROC
[3] Cowan R. D., 1981, THEORY ATOMIC STRUCT
[4] MANY-ELECTRON SINGULARITY IN X-RAY PHOTOEMISSION AND X-RAY LINE SPECTRA FROM METALS
DONIACH, S
SUNJIC, M
[J]. JOURNAL OF PHYSICS PART C SOLID STATE PHYSICS, 1970, 3 (02): : 285 - &
[5] KONDO LATTICE AND WEAK ANTIFERROMAGNETISM
DONIACH, S
[J]. PHYSICA B & C, 1977, 91 (JUL): : 231 - 234
[6] TB-FE-B AND LU-FE-B TERNARY-SYSTEMS
DUB, OM
KUZMA, YB
DAVID, MI
[J]. SOVIET POWDER METALLURGY AND METAL CERAMICS, 1987, 26 (07): : 563 - 566
[7] Quantum critical end point for the Kondo volume collapse model
Dzero, M.
Norman, M. R.
Paul, I.
Pepin, C.
Schmalian, J.
[J]. PHYSICAL REVIEW LETTERS, 2006, 97 (18)
[8] Valence instability of YbCu2Si2 through its magnetic quantum critical point
Fernandez-Panella, A.
Baledent, V.
Braithwaite, D.
Paolasini, L.
Verbeni, R.
Lapertot, G.
Rueff, J. -P.
[J]. PHYSICAL REVIEW B, 2012, 86 (12)
[9] Quantum criticality of Mott transition in organic materials
Furukawa, Tetsuya
Miyagawa, Kazuya
Taniguchi, Hiromi
Kato, Reizo
Kanoda, Kazushi
[J]. NATURE PHYSICS, 2015, 11 (03) : 221 - 224
[10] Quantum criticality in heavy-fermion metals
Gegenwart, Philipp
Si, Qimiao
Steglich, Frank
[J]. NATURE PHYSICS, 2008, 4 (03) : 186 - 197

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