Surface states on cubic d-band semiconductor pyrite (FeS 2)

A model for the electronic structure of the (100) surface of the d-band semiconductor pyrite (FeS 2) is presented based on ligand field theory. The existence of a new type of surface states at the valence band edge resulting from a symmetry reduction of the Fe coordination sphere is deduced. The mod...

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Veröffentlicht in:	Surface science 1994-08, Vol.314 (3), p.L931-L936
Hauptverfasser:	Bronold, M., Tomm, Y., Jaegermann, W.
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Electron density of states and band structure of crystalline solids Electron states Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures Exact sciences and technology Physics Surface and interface electron states Surface states, band structure, electron density of states
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Zusammenfassung:	A model for the electronic structure of the (100) surface of the d-band semiconductor pyrite (FeS 2) is presented based on ligand field theory. The existence of a new type of surface states at the valence band edge resulting from a symmetry reduction of the Fe coordination sphere is deduced. The model is able to explain the inversion layer observed on n-type crystals as well as surface core level shifts in S 2p photoemission spectra.
ISSN:	0039-6028 1879-2758
DOI:	10.1016/0039-6028(94)90230-5