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Solid-liquid transition induced by the anisotropic diffusion of colloidal particles |
| Fu-Jun Lin(蔺福军)1,2, Jing-Jing Liao(廖晶晶)2, Jian-Chun Wu(吴建春)1, and Bao-Quan Ai(艾保全)1,† |
1 Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, Guangdong-Hong Kong Joint Laboratory of Quantum Matter, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China;
2 School of Science, Jiangxi University of Science and Technology, Ganzhou 341000, China |
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Abstract We numerically study the phase behaviors of colloids with anisotropic diffusion in two dimensions. It is found that the diffusion anisotropy of colloidal particles plays an important role in the phase transitions. A strong diffusion anisotropy induces the large vibration of particles, subsequently, the system goes into a disordered state. In the presence of the strong-coupling, particles with weak diffusion anisotropy can freeze into hexagonal crystals. Thus, there exists a solid-liquid transition. With the degree of diffusion anisotropy increasing, the transition points are shifted to the stronger-coupled region. A competition between the degree of diffusion anisotropy and coupling strength widens the transition region where the heterogeneous structures coexist, which results in a broad-peak probability distribution curve for the local order parameter. Our study may be helpful for the experiments related to the phase behavior in statistical physics, materials science and biophysical systems.
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Received: 11 May 2021
Revised: 07 July 2021
Accepted manuscript online: 17 August 2021
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| Fund: Project supported in part by the National Natural Science Foundation of China (Grant Nos. 12075090, 11905086 and 12165015), the GDUPS (2016), and the Major Basic Research Project of Guangdong Province, China (Grant No. 2017KZDXM024), and the Natural Science Foundation of Jiangxi Province, China (Grant Nos. 2021BAB201015 and GJJ200820), and Science and Technology Planning Project of Ganzhou City (Grant No. 202101095077), and High-level Scientific Research Foundation for the Introduction of Talents of Jiangxi University of Science and Technology. |
Corresponding Authors:
Bao-Quan Ai
E-mail: aibq@scnu.edu.cn
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Cite this article:
Fu-Jun Lin(蔺福军), Jing-Jing Liao(廖晶晶), Jian-Chun Wu(吴建春), and Bao-Quan Ai(艾保全) Solid-liquid transition induced by the anisotropic diffusion of colloidal particles 2022 Chin. Phys. B 31 036401
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