The surface core level shift for lithium at the surface of lithium borate

Authors

• David Wooten, Air Force Institute of Technology, Wright Patterson Air Force Base, OH
• Ihor Ketsman, University of Nebraska-LincolnFollow
• Jie Xiao, University of Nebraska-LincolnFollow
• Yaroslav B. Losovyj, Louisiana State University at Baton RougeFollow
• J. C. Petrosky, Air Force Institute of TechnologyFollow
• J. McClory, Air Force Institute of Technology, Wright Patterson Air Force Base, OH
• Ya. V. Burak, Institute of Physical Optics, Lviv, Ukraine
• V. T. Adamiv, Institute of Physical Optics, Lviv, Ukraine
• Peter A. Dowben, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

2009

Comments

Published in Physica B (2009), doi:10.1016/j.physb.2009.08.312

Abstract

The shallow Li 1s core level exhibits a surface-to-bulk core level shift for the stoichiometric Li₂B₄O₇ (1 1 0) surface. Angle-resolved photoemission spectroscopy was used to identify Li1s bulk and surface core level components at binding energies –56.5 ± 0.4 and –53.7 ± 0.5 eV, respectively. We find photoemission evidence for surface states of Li₂B₄O₇ (1 1 0) that exist in the gap of the projected bulk density of states. The existence of surface states is consistent with the large surface-to-bulk core level shift for the Li 1s core.