Lattices of style sq and sq2 are 2d lattices that define a square unit cell with edge length = 1.0. This means a1 = 1 0 0 and a2 = 0 1 0. A sq lattice has 1 basis atom at the lower-left corner of the square. A sq2 lattice has 2 basis atoms, one at the corner and one at the

sq2：扩展的简单正方形晶格。 hex ：六方（Hexagonal）晶格。 custom ：自定义晶格，允许用户指定任意的晶格常数和原子位置。

In SPPARKS, a lattice is simply a set of points in space, determined by a unit cell with basis atoms, that is replicated infinitely in all dimensions. The arguments of the lattice command can be used to define a wide variety of crystallographic lattices. …

In mathematics, the square lattice is a type of lattice in a two-dimensional Euclidean space. It is the two-dimensional version of the integer lattice , denoted as ⁠ Z 2 {\displaystyle \mathbb {Z} ^{2}} ⁠ . [ 1 ]

lattice sq2 0.8442 region box prism 0 10 0 8 -0.5 0.5 0 0 0 create_box 2 box create_atoms 1 box mass * 1.0 velocity all create 1.44 87287 loop geom region slice block 4 6 INF INF INF INF setregion slicetype2 pair_style lj/cut 2.5 pair_coeff * * 1.0 1.0 1.0 neighbor 0.3 bin neigh_modify delay 0 every 1 fix 1 all nvt temp 0.3 0.3 0.3 tchain 1

Lattices of style sq and sq2 are 2d lattices that define a square unit cell with edge length = 1.0. This means a1 = 1 0 0 and a2 = 0 1 0. A sq lattice has 1 basis atom at the lower-left corner of the square. A sq2 lattice has 2 basis atoms, one at the corner and one at the center of the square.

lattice sq2 0.8442. region box block 0 20 0 20 -0.1 0.1. create_box 1 box. create_atoms 1 box. mass 1 1.0. velocity all create 5.0 87287 loop geom. pair_style lj/cut 2.5. pair_coeff 1 1 1.0 1.0 2.5. pair_modify shift yes. neighbor 0.3 bin. neigh_modify delay 0 every 1 check yes. fix 1 all nve.

# Point dipoles in a 2d box units lj atom_style hybrid sphere dipole dimension 2 lattice sq2 0.7 region box block 0 10 0 10 -0.5 0.5 create_box 1 box create_atoms 1 box # need both mass settings due to hybrid atom style mass 1 1.0 set group all mass 1.0 set group all dipole/random 98934 0.75 velocity all create 0.0 87287 mom no pair ...

lattice sq2 0.8442. region box prism 0 10 0 8 -0.5 0.5 0 0 0. create_box 2 box. create_atoms 1 box. mass * 1.0. velocity all create 1.44 87287 loop geom. region slice block 4 6 INF INF INF INF. set region slice type 2. pair_style lj/cut 4.0. pair_coeff * * 1.0 1.0. neighbor 0.3 bin ...

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