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

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.