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Honeycomb (two-atom) basis

Lattices & Geometry

A honeycomb crystal is a hexagonal lattice decorated with two basis atoms, sitting at the (1/3,1/3)(1/3, 1/3) and (2/3,2/3)(2/3, 2/3) fractional positions. This is the photonic analogue of graphene and famously hosts a Dirac point at KK. Multi-atom bases are not expressible through solve(); they require a [[geometry.atoms]] block per inclusion in a TOML config.

Explorer
▾honeycomb-toml/
honeycomb.py
1from blaze import BulkDriver
2
3# A honeycomb is a hexagonal lattice with TWO inclusions per cell.
4# Multi-atom bases go beyond solve(); describe them in TOML.
5driver = BulkDriver("honeycomb.toml")
6
7for result in driver.run_streaming():
8    print(result["num_bands"], "bands on", result["num_k_points"], "k-points")

Band diagram

Run the example to see the band diagram.

Result · BandResult

Run the example to inspect the result object.
Examples