Unconventional spin dynamics in the honeycomb-lattice material α-RuCl3: High-field electron spin resonance studies

被引：70

作者：

Ponomaryov, A. N. ^{[1
]}

Schulze, E. ^{[1
,2
]}

Wosnitza, J. ^{[1
,2
]}

Lampen-Kelley, P. ^{[3
,4
]}

Banerjee, A. ^{[5
]}

Yan, J. -Q. ^{[3
]}

Bridges, C. A. ^{[6
]}

Mandrus, D. G. ^{[3
]}

Nagler, S. E. ^{[5
]}

Kolezhuk, A. K. ^{[7
,8
,9
]}

Zvyagin, S. A. ^{[1
]}

机构：

[1] Helmholtz Zentrum Dresden Rossendorf, Dresden High Magnet Field Lab HLD EMFL, D-01328 Dresden, Germany

[2] Tech Univ Dresden, Inst Festkorper & Mat Phys, D-01062 Dresden, Germany

[3] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37821 USA

[4] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37821 USA

[5] Oak Ridge Natl Lab, Quantum Condensed Matter Div, Oak Ridge, TN 37821 USA

[6] Oak Ridge Natl Lab, Chem Sci Div, Oak Ridge, TN 37821 USA

[7] Taras Shevchenko Natl Univ Kyiv, Inst High Technol, UA-03022 Kiev, Ukraine

[8] Natl Acad Sci, Inst Magnetism, UA-03142 Kiev, Ukraine

[9] Minist Educ, UA-03142 Kiev, Ukraine

来源：

PHYSICAL REVIEW B | 2017年 / 96卷 / 24期

关键词：

MODEL;

D O I：

10.1103/PhysRevB.96.241107

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present high-field electron spin resonance (ESR) studies of the honeycomb-lattice material alpha-RuCl3, a prime candidate to exhibit Kitaev physics. Two modes of antiferromagnetic resonance were detected in the zigzag ordered phase, with magnetic field applied in the ab plane. A very rich excitation spectrum was observed in the field-induced quantum paramagnetic phase. The obtained data are compared with the results of recent numerical calculations, strongly suggesting a very unconventional multiparticle character of the spin dynamics in a-RuCl3. The frequency-field diagram of the lowest-energy ESR mode is found consistent with the behavior of the field-induced energy gap, revealed by thermodynamic measurements.

引用

页数：5

共 32 条

[1] Evidence for a Field-Induced Quantum Spin Liquid in α-RuCl3 [J].

Baek, S-H. ;

Do, S-H. ;

Choi, K-Y. ;

Kwon, Y. S. ;

Wolter, A. U. B. ;

Nishimoto, S. ;

van den Brink, Jeroen ;

Buechner, B. .

PHYSICAL REVIEW LETTERS, 2017, 119 (03)

[2]

Banerjee A, 2016, NAT MATER, V15, P733, DOI [10.1038/nmat4604, 10.1038/NMAT4604]

[3] Neutron scattering in the proximate quantum spin liquid α-RuCl3 [J].

Banerjee, Arnab ;

Yan, Jiaqiang ;

Knolle, Johannes ;

Bridges, Craig A. ;

Stone, Matthew B. ;

Lumsden, Mark D. ;

Mandrus, David G. ;

Tennant, David A. ;

Moessner, Roderich ;

Nagler, Stephen E. .

SCIENCE, 2017, 356 (6342) :1055-1058

[4]

Baryakhtar V. G., 1985, SOV PHYS JETP, V61, P823

[5] Exact results for spin dynamics and fractionalization in the Kitaev model [J].

Baskaran, G. ;

Mandal, Saptarshi ;

Shankar, R. .

PHYSICAL REVIEW LETTERS, 2007, 98 (24)

[6] Kitaev-Heisenberg Model on a Honeycomb Lattice: Possible Exotic Phases in Iridium Oxides A2IrO3 [J].

Chaloupka, Jiri ;

Jackeli, George ;

Khaliullin, Giniyat .

PHYSICAL REVIEW LETTERS, 2010, 105 (02)

[7] Majorana fermions in the Kitaev quantum spin system α-RuCl3 [J].

Do, Seung-Hwan ;

Park, Sang-Youn ;

Yoshitake, Junki ;

Nasu, Joji ;

Motome, Yukitoshi ;

Kwon, Yong Seung ;

Adroja, D. T. ;

Voneshen, D. J. ;

Kim, Kyoo ;

Jang, T. -H. ;

Park, J. -H. ;

Choi, Kwang-Yong ;

Ji, Sungdae .

NATURE PHYSICS, 2017, 13 (11) :1079-+

[8]

Hentrich R., ARXIV170308623

[9] Mott Insulators in the Strong Spin-Orbit Coupling Limit: From Heisenberg to a Quantum Compass and Kitaev Models [J].

Jackeli, G. ;

Khaliullin, G. .

PHYSICAL REVIEW LETTERS, 2009, 102 (01)

[10] Honeycomb-Lattice Heisenberg-Kitaev Model in a Magnetic Field: Spin Canting, Metamagnetism, and Vortex Crystals [J].

Janssen, Lukas ;

Andrade, Eric C. ;

Vojta, Matthias .

PHYSICAL REVIEW LETTERS, 2016, 117 (27)

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