The electronic structure of Li2B4O7(110) and Li2B4O7(100)

The band structure of Li2B4O7(100) and Li2B4O7(110) was experimentally determined using a combination of angle-resolved photoemission and angle-resolved inverse photoemission spectroscopies. The experimental band gap depends on crystallographic direction but exceeds 8.8 eV, while the bulk band gap i...

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Veröffentlicht in:	European physical journal. Applied physics 2010-12, Vol.52 (3)
Hauptverfasser:	Wooten, D., Ketsman, I., Xiao, J., Losovyj, Ya. B., Petrosky, J., McClory, J., Burak, Ya. V., Adamiv, V. T., Brown, J. M., Dowben, P. A.
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Condensed matter: structure, mechanical and thermal properties Electron states Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures Exact sciences and technology Methods of electronic structure calculations Physics Structure and morphology thickness Surface and interface electron states Surface states, band structure, electron density of states Surfaces and interfaces thin films and whiskers (structure and nonelectronic properties) Thin film structure and morphology
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Zusammenfassung:	The band structure of Li2B4O7(100) and Li2B4O7(110) was experimentally determined using a combination of angle-resolved photoemission and angle-resolved inverse photoemission spectroscopies. The experimental band gap depends on crystallographic direction but exceeds 8.8 eV, while the bulk band gap is believed to be in the vicinity of 9.8 eV, in qualitative agreement with expectations. The occupied bulk band structure indicates relatively large values for the hole mass; with the hole mass as significantly larger than that of the electron mass derived from the unoccupied band structure. The Li2B4O7(110) surface is characterized by a very light mass image potential state and a surface state that falls within the band gap of the projected bulk band structure.
ISSN:	1286-0042 1286-0050
DOI:	10.1051/epjap/2010160