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C原子在Si基底沉积dimension 3 units metal # Energy: eV Distance: Angstrom Mass: Kg Times: picosecond atom_style atomic # Classical particles boundary p p f # p = periodic, f= fixed #定义Si的晶格常数 variable lat_a equal 5.43 # SiC:4.3210 #定义盒子长度 variable len_x equal 6*${lat_a} variable len_y equal 6*${lat_a} variable len_z equal 12*${lat_a} variable len_z2 equal ${len_z}/2 #创建box region bbox block 0 ${len_x} 0 ${len_y} 0 ${len_z} units box create_box 2 bbox #创建底部Si模型 lattice diamond ${lat_a} region lbox block 0 ${len_x} 0 ${len_y} 0 ${len_z2} units box create_atoms 1 region lbox #创建上部C原子生成区域 region sput block 2.0 23.0 2.0 23.0 54.3 60.0 units box #原子分组:底部固定部分和上部原子部分 region bot block INF INF INF INF 0.0 2.72 units box group fbot region bot group other subtract all fbot #摩尔质量设置 mass 1 28.09 mass 2 12.01 #力场设置,tersoff力场,lammps有自带sic.tersoff文件,可替换本文件 pair_style tersoff pair_coeff * * SiC_1989.tersoff Si C #近邻列表参数设置 neighbor 0.5 bin neigh_modify delay 1 check yes #轨迹文件输出设置 dump 1d all custom 1000 dump.sputter id type x y z #屏幕输出信息设置 reset_timestep 0 thermo 5000 thermo_style custom step pe ke etotal temp vol press #固定底部原子,防止在沉积过程中移动 fix s1 fbot setforce 0.0 0.0 0.0 #能量最小化 min_style cg minimize 1e-8 1e-8 10000 10000 #温度初始化 velocity other create 298 39849 mom yes rot yes dist gaussian #nvt系综下进行弛豫 fix 1 all nvt temp 298.00 298.0 10.0 run 20000 #沉积过程 #沉积原子类型为2,数量500个 fix 4 all deposit 500 2 500 95485 region sput near 1.2 vz -0.5 -1.5 target 12.0 12.0 28.0 units box #删除飞出box外的原子 thermo_modify lost ignore flush yes run 100000 上一篇addforce链拉伸下一篇团簇融化 |