Evidence for field induced quantum spin liquid behavior in a spin-1/2 honeycomb magnet

Gaoting Lin; Mingfang Shu; Qirong Zhao; Gang Li; Yinina Ma; Jinlong Jiao; Yuting Li; Guijing Duan; Qing Huang; Jieming Sheng; Alexander I. Kolesnikov; Lu Li; Liusuo Wu; Hongwei Chen; Rong Yu; Xiaoqun Wang; Zhengxin Liu; Haidong Zhou; Jie Ma

doi:10.59717/j.xinn-mater.2024.100082

The Innovation Materials > 2024 Vol. 2 > No. 3 > 100082

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Evidence for field induced quantum spin liquid behavior in a spin-1/2 honeycomb magnet

1.
Key Laboratory of Artificial Structures and Quantum Control, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
2.
Department of Physics, Renmin University of China, Beijing 100872, China
3.
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
4.
Department of Physics and Astronomy, University of Tennessee, Knoxville 37996, USA
5.
Shenzhen Institute for Quantum Science and Engineering (SIQSE) and Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
6.
Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge 37831, USA
7.
Department of Physics, University of Michigan, Ann Arbor 48109, USA
8.
College of Materials Science and Chemistry, China Jiliang University, Hangzhou 310018, China
9.
Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
10.
Guangdong Provincial Key Laboratory of Extreme Conditions, Dongguan 523803, China
11.
These authors contributed equally

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Corresponding authors: liuzxphys@ruc.edu.cn (Z.L.); hzhou10@utk.edu (H.Z); jma3@sjtu.edu.cn (J.M.)
Received Date: March 08, 2024

Accepted Date: June 26, 2024

Published Online: July 02, 2024

The Innovation Materials 2(3), https://doi.org/10.59717/j.xinn-mater.2024.100082 | Cite this article

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PUBLIC SUMMARY

PUBLIC SUMMARY
1. Field-induced quantum spin liquid state in spin-1/2 honeycomb magnet Na₂Co₂TeO₆ is highly desired.
  
  The absence of symmetry breaking is realized by the persistence of C₆ symmetry under a magnetic field.
  
  The continuum and Variational Monte Carlo simulation support the field-induced quantum spin liquid state.

ABSTRACT

ABSTRACT

One of the most important issues in modern condensed matter physics is the realization of fractionalized excitations, such as the Majorana excitations in the Kitaev quantum spin liquid. To this aim, the 3d-based Kitaev material Na₂Co₂TeO₆ is a promising candidate whose magnetic phase diagram of B // a* contains a field-induced intermediate magnetically disordered phase within 7.5 T < |B| < 10 T. The experimental observations, including the restoration of the crystalline point group symmetry in the angle-dependent torque and the coexisting magnon excitations and spinon-continuum in the inelastic neutron scattering spectrum, provide strong evidence that this disordered phase is a field induced quantum spin liquid with partially polarized spins. Our variational Monte Carlo simulation with the effective K-J₁-Γ-Γ'-J₃ model reproduces the experimental data and further supports this conclusion.
- Kitaev quantum spin liquid /
- bond-dependent frustrated magnet /
- quantum fluctuations under magnetic fields /
- honeycomb lattice

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REFERENCES

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Lin G., Shu M., Zhao Q., et al., (2024). Evidence for field induced quantum spin liquid behavior in a spin-1/2 honeycomb magnet. The Innovation Materials 2(3): 100082. https://doi.org/10.59717/j.xinn-mater.2024.100082

Lin G., Shu M., Zhao Q., et al., (2024). Evidence for field induced quantum spin liquid behavior in a spin-1/2 honeycomb magnet. The Innovation Materials 2(3): 100082. https://doi.org/10.59717/j.xinn-mater.2024.100082

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Evidence for field induced quantum spin liquid behavior in a spin-1/2 honeycomb magnet

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