E8 Spectra of Quasi-One-Dimensional Antiferromagnet BaCo2V2O8 under Transverse Field

被引：33

作者：

Zou, Haiyuan ^{[1
]}

Cui, Yi ^{[2
,3
]}

Wang, Xiao ^{[1
]}

Zhang, Z. ^{[1
]}

Yang, J. ^{[1
]}

Xu, G. ^{[1
,4
]}

Okutani, A. ^{[5
]}

Hagiwara, M. ^{[5
]}

Matsuda, M. ^{[6
]}

Wang, G. ^{[7
]}

Mussardo, Giuseppe ^{[8
,9
]}

Hodsagi, K. ^{[10
]}

Kormos, M. ^{[11
]}

He, Zhangzhen ^{[12
]}

Kimura, S. ^{[13
]}

Yu, Rong ^{[2
,3
]}

Yu, Weiqiang ^{[2
,3
]}

Ma, Jie ^{[14
]}

Wu, Jianda ^{[1
,15
]}

机构：

[1] Shanghai Jiao Tong Univ, Tsung Dao Lee Inst, Shanghai 200240, Peoples R China

[2] Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China

[3] Renmin Univ China, Beijing Key Lab Optoelect Funct Mat & Micronano D, Beijing 100872, Peoples R China

[4] Natl Inst Stand & Technol, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA

[5] Osaka Univ, Grad Sch Sci, Ctr Adv High Magnet Field Sci, Toyonaka, Osaka 5600043, Japan

[6] Oak Ridge Natl Lab, Neutron Scattering Div, Oak Ridge, TN 37831 USA

[7] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China

[8] Sez Trieste, INFN, Via Bonomea 265, I-34136 Trieste, Italy

[9] Sez Trieste, SISSA, Via Bonomea 265, I-34136 Trieste, Italy

[10] Budapest Univ Technol & Econ, Inst Phys, BME MTA Stat Field Theory Res Grp, Budafoki Ut 8, H-1111 Budapest, Hungary

[11] Budapest Univ Technol & Econ, Dept Theoret Phys, MTA BME Quantum Dynam & Correlat Res Grp, Budafoki Ut 8, H-1111 Budapest, Hungary

[12] Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China

[13] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

[14] Shanghai Jiao Tong Univ, Sch Phys & Astron, Key Lab Artificial Struct & Quantum Control, Shenyang Natl Lab Mat Sci,Minist Educ, Shanghai 200240, Peoples R China

[15] Shanghai Jiao Tong Univ, Sch Phys & Astron, Shanghai 200240, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2021年 / 127卷 / 07期

基金：

中国国家自然科学基金; 上海市自然科学基金; 中国博士后科学基金;

关键词：

2-DIMENSIONAL ISING-MODEL; MAGNETIC-FIELD;

D O I：

10.1103/PhysRevLett.127.077201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report V-51 NMR and inelastic neutron scattering (INS) measurements on a quasi-1D antiferromagnet BaCo2V2O8 under transverse field along the [010] direction. The scaling behavior of the spin-lattice relaxation rate above the Neel temperatures unveils a 1D quantum critical point (QCP) at H-c(1D) approximate to 4.7 T, which is masked by the 3D magnetic order. With the aid of accurate analytical analysis and numerical calculations, we show that the zone center INS spectrum at H-c(1D) c is precisely described by the pattern of the 1D quantum Ising model in a magnetic field, a class of universality described in terms of the exceptional E-8 Lie algebra. These excitations are nondiffusive over a certain field range when the system is away from the 1D QCP. Our results provide an unambiguous experimental realization of the massive E-8 phase in the compound, and open a new experimental route for exploring the dynamics of quantum integrable systems as well as physics beyond integrability.

引用

页数：6

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