当前位置: X-MOL 学术Soft Matter › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Two-step melting of the Weeks–Chandler–Anderson system in two dimensions
Soft Matter ( IF 3.4 ) Pub Date : 2021-2-10 , DOI: 10.1039/d0sm01484b
Shubhendu Shekhar Khali 1, 2, 3, 4 , Dipanjan Chakraborty 1, 2, 3, 4 , Debasish Chaudhuri 4, 5, 6, 7, 8
Affiliation  

We present a detailed numerical simulation study of a two-dimensional system of particles interacting via the Weeks–Chandler–Anderson potential, the repulsive part of the Lennard-Jones potential. With the reduction of density, the system shows a two-step melting: a continuous melting of solid to hexatic phase, followed by a first-order melting of hexatic to liquid. The solid–hexatic melting is consistent with the Berezinskii–Kosterlitz–Thouless–Halperin–Nelson–Young (BKTHNY) scenario and shows dislocation unbinding. The first-order melting of the hexatic to the liquid phase, on the other hand, displays defect-strings formed at the hexatic–liquid interfaces. We present a detailed phase diagram in the density-temperature plane.

中文翻译:

二维的Weeks–Chandler–Anderson系统的两步融合

我们提供了一个二维二维粒子系统的详细数值模拟研究,该二维系统通过Weeks-Chandler-Anderson势相互作用,这是Lennard-Jones势的排斥部分。随着密度的降低,该系统显示出两步熔融:从固相到六相的连续熔融,然后是从六相到液体的一阶熔融。固相-六方体的熔融与Berezinskii-Kosterlitz-Thouless-Halperin-Nelson-Young(BKTHNY)的情况一致,并显示位错解脱。另一方面,六方晶向液相的一阶熔融显示在六方晶-液相界面处形成的缺陷串。我们在密度-温度平面上给出了详细的相图。
更新日期:2021-03-03
down
wechat
bug