Symmetry 2013, 5(4), 344-354; doi:10.3390/sym5040344
Article

Effect of Symmetry Breaking on Electronic Band Structure: Gap Opening at the High Symmetry Points

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Received: 23 September 2013; in revised form: 11 November 2013 / Accepted: 3 December 2013 / Published: 9 December 2013
(This article belongs to the Special Issue Symmetry Breaking)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: Some characteristic features of band structures, like the band degeneracy at high symmetry points or the existence of energy gaps, usually reflect the symmetry of the crystal or, more precisely, the symmetry of the wave vector group at the relevant points of the Brillouin zone. In this paper, we will illustrate this property by considering two-dimensional (2D)-hexagonal lattices characterized by a possible two-fold degenerate band at the K points with a linear dispersion (Dirac points). By combining scanning tunneling spectroscopy and angle-resolved photoemission, we study the electronic properties of a similar system: the Ag/Cu(111) interface reconstruction characterized by a hexagonal superlattice, and we show that the gap opening at the K points of the Brillouin zone of the reconstructed cell is due to the symmetry breaking of the wave vector group.
Keywords: symmetry; electronic structure; gap opening
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MDPI and ACS Style

Vasseur, G.; Fagot-Revurat, Y.; Kierren, B.; Sicot, M.; Malterre, D. Effect of Symmetry Breaking on Electronic Band Structure: Gap Opening at the High Symmetry Points. Symmetry 2013, 5, 344-354.

AMA Style

Vasseur G, Fagot-Revurat Y, Kierren B, Sicot M, Malterre D. Effect of Symmetry Breaking on Electronic Band Structure: Gap Opening at the High Symmetry Points. Symmetry. 2013; 5(4):344-354.

Chicago/Turabian Style

Vasseur, Guillaume; Fagot-Revurat, Yannick; Kierren, Bertrand; Sicot, Muriel; Malterre, Daniel. 2013. "Effect of Symmetry Breaking on Electronic Band Structure: Gap Opening at the High Symmetry Points." Symmetry 5, no. 4: 344-354.

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