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Surface charging at the (1 0 0) surface of Cu doped and undoped Li2B4O7 |
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| Authors: | Jie XiaoN Lozova YaB Losovyj D WootenI Ketsman MW SwinneyJ Petrosky J McCloryYaV Burak VT AdamivAT Brant PA Dowben |
| Institution: | a Department of Physics and Astronomy and the Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Theodore Jorgensen Hall 855 North 16th Street, Lincoln, NE 68588-0299, USA b J. Bennett Johnston Sr. Center for Advanced Microstructures and Devices, Louisiana State University, 6980 Jefferson Highway, Baton Rouge, LA 70806, USA c Air Force Institute of Technology, 2950 Hobson Way, Wright Patterson Air Force Base, OH 45433-7765, USA d Institute of Physical Optics, 23 Dragomanov Str., Lviv 79005, Ukraine e Department of Engineering Physics, West Virginia University, Morgantown, WV 26506, USA |
| Abstract: | We have compared the photovoltaic charging of the (1 0 0) surface termination for Cu doped and undoped Li2B4O7. While the surface charging at the (1 0 0) surface of Li2B4O7 is significantly greater than observed at (1 1 0) surface, the Cu doping plays a role in reducing the surface photovoltage effects. With Cu doping of Li2B4O7, the surface photovoltaic charging is much diminished at the (1 0 0) surface. The density of states observed with combined photoemission and inverse photoemission remains similar to that observed for the undoped material, except in the vicinity of the conduction band edge. |
| Keywords: | 79 60 Ai 68 55 Ln 29 40 Wk 81 05 J |
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