## 摘要

The Curie constants C^{∗}=lim_{T→0}Tχ_{imp} of a spin-1/2 and a spin-1 impurities are calculated using the quantum Monte Carlo simulations. Here the impurity susceptibility χ_{imp} is the difference between the uniform susceptibilities with and without the impurity and T is the temperature. The two-dimensional quantum JQ_{3} model on the honeycomb lattice is considered as the host system, and Tχ_{imp} as a function T is investigated in great detail. Remarkably, our data indicates strongly that C^{∗}>0.25 and C^{∗}>2/3 for the spin-1/2 and the spin-1 impurities, respectively. In particular, although no definite conclusion is obtained due to finite-size effects, we find that the Curie constant associated with a spin-1/2 impurity likely converges to a value greater than the established result of 0.262(2) in the literature. The outcomes reached here provide certain evidence that fractional impurity spin is observed for the studied JQ_{3} system.

原文 | 英語 |
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頁（從 - 到） | 41-46 |

頁數 | 6 |

期刊 | Chinese Journal of Physics |

卷 | 82 |

DOIs | |

出版狀態 | 已發佈 - 2023 4月 |

## ASJC Scopus subject areas

- 一般物理與天文學

## 指紋

深入研究「Evidence of anomalous Curie constants for nonmagnetic impurities in a critical 2-dimensional JQ_{3}model on the honeycomb lattice」主題。共同形成了獨特的指紋。