Scissors modes in crystals with cubic symmetry

Details Scissors modes in crystals with cubic symmetry Scissors modes in crystals with cubic symmetry

2009-09-08

arxiv.org/abs/0909.1422v3

Eur. Phys. J. B 77, 41-45 (2010)

Physics

Condensed Matter

Other Condensed Matter

4 pages, 2 figures

Scientific paper

10.1140/epjb/e2010-00251-x

We recently suggested that the Scissors Mode (a collective excitation in which one system rotates with respect another one conserving its shape) can occur in crystals with axially symmetric atoms as a precession of these atoms around the anisotropy axis of their cells, giving rise to a form of dichroism. In the present paper we investigate how the Scissors Mode can be realized in crystals with cubic symmetry and evaluate its photo-absorption cross-section. This turns out to be of the same order of magnitude as that for crystals with axially symmetric atoms, but does not exhibit any correlation between the direction of the photon and the axes of the cell.

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