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

Published online by Cambridge University Press:  30 November 2010

D. Wooten
Affiliation:
Air Force Institute of Technology, 2950 Hobson Way, Wright-Patterson Air, Force Base, OH, 45433-7765, USA
I. Ketsman
Affiliation:
Department of Physics and Astronomy and the Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, P.O. Box 880111, Lincoln, NE, 68588-0111, USA
J. Xiao
Affiliation:
Department of Physics and Astronomy and the Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, P.O. Box 880111, Lincoln, NE, 68588-0111, USA
Ya. B. Losovyj
Affiliation:
Department of Physics and Astronomy and the Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, P.O. Box 880111, Lincoln, NE, 68588-0111, USA J. Bennett Johnston Sr. Center for Advanced Microstructures and Devices, Louisiana State University, 6980 Jefferson Highway, Baton Rouge, LA, 70806, USA
J. Petrosky
Affiliation:
Air Force Institute of Technology, 2950 Hobson Way, Wright-Patterson Air, Force Base, OH, 45433-7765, USA
J. McClory
Affiliation:
Air Force Institute of Technology, 2950 Hobson Way, Wright-Patterson Air, Force Base, OH, 45433-7765, USA
Ya. V. Burak
Affiliation:
Institute of Physical Optics, Dragomanov 23, Lviv, 79005, Ukraine
V. T. Adamiv
Affiliation:
Institute of Physical Optics, Dragomanov 23, Lviv, 79005, Ukraine
J. M. Brown
Affiliation:
Cincinatti Children's Hospital Medical Center, 32344 Burnet Avenue, Cincinatti, OH, USA
P. A. Dowben*
Affiliation:
Department of Physics and Astronomy and the Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, P.O. Box 880111, Lincoln, NE, 68588-0111, USA
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Abstract

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.

Type
Research Article
Copyright
© EDP Sciences, 2010

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