Quantum dynamics of topological strings in a frustrated Ising antiferromagnet

Zhou, Zheng1,2,3; Liu, Changle4,5,6,7; Yan, Zheng8,9,10; Chen, Yan1,2,11; Zhang, Xue-Feng4,5,12

2022-06-08

10.1038/s41535-022-00465-3

NPJ QUANTUM MATERIALS   Impact Factor & Quartile

2397-4648

We investigate the quantum dynamics of the antiferromagnetic transverse field Ising model on the triangular lattice through large-scale quantum Monte Carlo simulations and stochastic analytic continuation. This model effectively describes a series of triangular rare-earth compounds, for example, TmMgGaO4. At weak transverse field, we capture the excitations related to topological quantum strings, which exhibit continuum features described by XY chain along the strings and those in accord with 'Luttinger string liquid' in the perpendicular direction. The continuum features can be well understood from the perspective of topological strings. Furthermore, we identify the contribution of strings from the excitation spectrum. Our study provides characteristic features for the experimental search for string-related excitations and proposes a theoretical method to pinpoint topological excitations in the experimental spectra.

SCI

English

Others

National Key Research and Development Program of China["2017YFA0304204","2016YFA0300501","2016YFA0300504"] ; National Natural Science Foundation of China[11925402,11625416,11474064] ; Shanghai Municipal Government["19XD1400700","19JC1412702"] ; National Science Foundation of China[11874094,12147102] ; Fundamental Research Funds for the Central Universities[2021CDJZYJH-003] ; CURE[19925] ; National University Student Innovation Program[201910246148] ; Guangdong province["2016ZT06D348","2020KCXTD001"] ; National Key RD Program[2016YFA0301700] ; Shenzhen High-level Special Fund["G02206304","G02206404"] ; Science, Technology and Innovation Commission of Shenzhen Municipality["ZDSYS20170303165926217","JCYJ20170412152620376","KYTDPT20181011104202253"]

Materials Science ; Physics

Materials Science, Multidisciplinary ; Quantum Science & Technology ; Physics, Applied ; Physics, Condensed Matter

WOS:000808334100002

NATURE PORTFOLIO

2-s2.0-85131728648

Web of Science

1.Fudan Univ, Dept Phys, Shanghai 200438, Peoples R China
2.Fudan Univ, State Key Lab Surface Phys, Shanghai 200438, Peoples R China
3.Perimeter Inst Theoret Phys, Waterloo, ON N2L 2Y5, Canada
4.Chongqing Univ, Dept Phys, Chongqing 401331, Peoples R China
5.Chongqing Univ, Ctr Quantum Mat & Devices, Chongqing 401331, Peoples R China
6.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Technol, Shenzhen 518055, Peoples R China
7.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
8.Beihang Hangzhou Innovat Inst, Hangzhou 310023, Peoples R China
9.Univ Hong Kong, Dept Phys, Pokfulam Rd, Hong Kong, Peoples R China
10.Univ Hong Kong, HKU UCAS Joint Inst Theoret & Computat Phys, Pokfulam Rd, Hong Kong, Peoples R China
11.Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China
12.Chongqing Univ, Chongqing Key Lab Strongly Coupled Phys, Chongqing 401331, Peoples R China

Zhou, Zheng,Liu, Changle,Yan, Zheng,et al. Quantum dynamics of topological strings in a frustrated Ising antiferromagnet[J]. NPJ QUANTUM MATERIALS,2022,7(1).

Zhou, Zheng,Liu, Changle,Yan, Zheng,Chen, Yan,&Zhang, Xue-Feng.(2022).Quantum dynamics of topological strings in a frustrated Ising antiferromagnet.NPJ QUANTUM MATERIALS,7(1).

Zhou, Zheng,et al."Quantum dynamics of topological strings in a frustrated Ising antiferromagnet".NPJ QUANTUM MATERIALS 7.1(2022).