Odd Response-Induced Phase Separation of Active Spinners  

作　　者：Yu Ding Boyi Wang Qing Yang Zhiyuan Zhao Shigeyuki Komura Ryohei Seto Mingcheng Yang Fangfu Ye 

机构地区：[1]Beijing National Laboratory for Condensed Matter Physics and Laboratory of Soft Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [2]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [3]Wenzhou Institute,University of Chinese Academy of Sciences,Wenzhou,Zhejiang 325001,China [4]Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine,Vision and Brain Health),Wenzhou,Zhejiang 325000,China [5]Department of Chemistry,Graduate School of Science,Tokyo Metropolitan University,Hachioji,Tokyo 192-0397,Japan [6]Graduate School of Information Science,University of Hyogo,Kobe,Hyogo 650-0047,Japan [7]Songshan Lake Materials Laboratory,Dongguan,Guangdong 523808,China

出　　处：《Research》2025年第1期47-54,共8页研究(英文)

基　　金：the support of the National Natural Science Foundation of China(Nos.T2325027,12274448,12325405,and 12174390);the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB33000000).

摘　　要：Due to the breaking of time-reversal and parity symmetries and the presence of non-conservative microscopic interactions,active spinner fluids and solids respectively exhibit nondissipative odd viscosity and nonstorage odd elasticity,engendering phenomena unattainable in traditional passive or active systems.Here,we study the effects of odd viscosity and elasticity on phase behaviors of active spinner systems.We find the spinner fluid under a simple shear experiences an anisotropic gas-liquid phase separation driven by the odd-viscosity stress.This phase separation exhibits equilibrium-like behavior,with both binodal-like and spinodal curves and critical point.However,the formed dense liquid phase is unstable,since the odd elasticity instantly takes over the odd viscosity to condense the liquid into a solid-like phase.The unusual phase behavior essentially arises from the competition between thermal fluctuations and the odd response-induced effective attraction.Our results demonstrate that the cooperation of odd viscosity and elasticity can lead to exotic phase behavior,revealing their fundamental roles in phase transition.

关 键 词：phase separation active spinner systemswe phase behaviors odd elasticity odd viscosity spinner fluid passive active systemsherewe spinner fluids 

分 类 号：O469[理学—凝聚态物理]