A group-theory approach labels BSE excitons with irreducible representations and total crystal angular momentum to derive selection rules and conservation laws, demonstrated in three materials.
Altmann,Rotations, Quaternions, and Double Groups (Dover Publications, 2005)
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Symmetries of excitons
A group-theory approach labels BSE excitons with irreducible representations and total crystal angular momentum to derive selection rules and conservation laws, demonstrated in three materials.