Resonant inelastic X-ray scattering as a probe of Jeff=1/2 state in 3d transition-metal oxide

被引：3

作者：

Huang, H. Y. ^{[1
]}

Singh, A. ^{[1
]}

Wu, C., I ^{[2
]}

Xie, J. D. ^{[3
]}

Okamoto, J. ^{[1
]}

Belik, A. A. ^{[4
]}

Kurmaev, E. ^{[5
]}

Fujimori, A. ^{[1
,6
]}

Chen, C. T. ^{[1
]}

Streltsov, S., V ^{[5
,7
]}

Huang, D. J. ^{[1
,3
,8
]}

机构：

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

[2] Natl Tsing Hua Univ, Grad Program Sci & Technol Synchrotron Light Sour, Hsinchu 30013, Taiwan

[3] Natl Yang Ming Chiao Tung Univ, Dept Electrophys, Hsinchu 30010, Taiwan

[4] Natl Inst Mat Sci NIMS, Int Ctr Mat Nanoarchitecton WPI MANA, Namiki 1-1, Tsukuba, Ibaraki 3050044, Japan

[5] Inst Met Phys, S Kovalevskoy St 18, Ekaterinburg 620990, Russia

[6] Waseda Univ, Dept Appl Phys, Shinjuku Ku, Tokyo 1698555, Japan

[7] Ural Fed Univ, Dept Theoret Phys & Appl Math, Mira St 19, Ekaterinburg 620002, Russia

[8] Natl Tsing Hua Univ, Dept Phys, Hsinchu 30013, Taiwan

来源：

NPJ QUANTUM MATERIALS | 2022年 / 7卷 / 01期

基金：

俄罗斯科学基金会;

关键词：

SPIN; PHYSICS;

D O I：

10.1038/s41535-022-00430-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The state with effective total moment J(eff) = 1/2 stabilized by the spin-orbit coupling is known to suppress Jahn-Teller distortions and may induce a strong exchange anisotropy. This in turn may lead to the formation of an elusive spin-liquid state in real materials. While recent studies have demonstrated that such a situation can be realized in 3d transition-metal compounds such as those based on Co2+ and Cu2+, diagnosis of J(eff) = 1/2 state remains challenging. We show that resonant inelastic X-ray scattering is an effective tool to probe this state and apply it to CuAl2O4, material where Cu2+ ions were previously proposed to be in the J(eff) = 1/2 state. Our results unambiguously demonstrate that, contrary to previous expectations, a competitive (to J(eff) = 1/2) Jahn-Teller state realizes in this compound.

引用

页数：6

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