Periodic Boundary Conditions on non sq lattice

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SUMMARY

Periodic boundary conditions can be effectively applied to various two-dimensional lattices, including rhombic, hexagonal, and oblique lattices. The indexing of these lattices follows the same principles as square lattices, utilizing basis vectors. For instance, in a hexagonal lattice, basis vectors can be defined along two sides of a triangle, denoted as \vec R_1 and \vec R_2. By selecting large values for N_1 and N_2, one can establish periodic conditions by identifying lattice points with the origin.

PREREQUISITES
  • Understanding of periodic boundary conditions in lattice structures
  • Familiarity with two-dimensional lattice types, specifically hexagonal and rhombic lattices
  • Knowledge of basis vectors and their role in lattice indexing
  • Mathematical proficiency in working with limits and infinite series
NEXT STEPS
  • Research the application of periodic boundary conditions in hexagonal lattices
  • Study the indexing methods for rhombic and oblique lattices
  • Explore advanced lattice theory and its implications in computational physics
  • Learn about the mathematical formulation of basis vectors in various lattice types
USEFUL FOR

This discussion is beneficial for physicists, materials scientists, and computational researchers interested in lattice structures and their boundary conditions.

cmphys1
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Is it possible to impose boundary conditions on the other 2d lattices like
a rhombic lattice?
a hexagonal lattice?
an oblique lattice?

How does one typically index such lattices?
 
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Yes, and in the same way as for a square lattice. In any lattice you still have basis vectors. For example, in the hexagonal lattice the basis vectors can be chosen to look like they point along two sides of a triangle. Call one of these \vec R_1 and the other \vec R_2. You can pick some N_1 tending to infinity and identify the lattice point N_1 \vec R_1 with 0. Also pick some N_2 tending to infinity and identify the lattice point N_2 \vec R_2 with 0. Then you have periodic boundary conditions.
 

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