The surface electronic structure of Si(1 1 1)-$7\times 7$ has been studied by angle-resolved photo electron spectroscopy. Replicas of the S 1 surface state are found in correspondence with several $7\times 7$ unit cells in the reciprocal space. This observation resolves in a direct way the long-standing dichotomy between the structural and electronic properties of the system previously discussed on the basis of the $2\times 2$ or $\sqrt{3}\times \sqrt{3}$ R30° surface models.
Signature of surface periodicity in the electronic structure of Si (111)-(7x7)
Polina Sheverdyaeva;Fabio Ronci;Stefano Colonna;Paolo Moras;Mauro Satta;Roberto Flammini
2017
Abstract
The surface electronic structure of Si(1 1 1)-$7\times 7$ has been studied by angle-resolved photo electron spectroscopy. Replicas of the S 1 surface state are found in correspondence with several $7\times 7$ unit cells in the reciprocal space. This observation resolves in a direct way the long-standing dichotomy between the structural and electronic properties of the system previously discussed on the basis of the $2\times 2$ or $\sqrt{3}\times \sqrt{3}$ R30° surface models.File in questo prodotto:
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