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

• Published in: Physica. B, Condensed matter Vol. 405; no. 1; pp. 461 - 464
• Main Authors: Wooten, David, Ketsman, I., Xiao, Jie, Losovyj, Ya.B., Petrosky, J., McClory, J., Burak, Ya.V., Adamiv, V.T., Dowben, P.A.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 2010; Elsevier
• Subjects: Binding energy; Bulk density; Clean metal, semiconductor, and insulator surfaces; Condensed matter; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Electron and ion emission by liquids and solids; impact phenomena; Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures; Exact sciences and technology; Lithium; Lithium borates; Lithium tetraborate; Oxide dielectric layers; Photoelectron spectroscopy; Photoemission; Photoemission and photoelectron spectra; Physics; Surface and interface electron states; Surface states, band structure, electron density of states; Surface-to-bulk core level shift; 33.60.Cv; 05.70.Np; Lithium tetraborate; 68.35.Md; 68.47.Ch; Oxide dielectric layers; 79.60.−i; Surface-to-bulk core level shift; Photoelectron spectra; 79.60 -i; Surface electron state; Angle resolved photoemission spectroscopy; Lithium; Core levels; Lithium Borates; Binding energy
• ISSN: 0921-4526; 1873-2135
• DOI: 10.1016/j.physb.2009.08.312

The shallow Li 1s core level exhibits a surface-to-bulk core level shift for the stoichiometric Li
2B
4O
7(1
1
0) surface. Angle-resolved photoemission spectroscopy was used to indentify Li 1s 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 Li
2B
4O
7(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.