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Interface photovoltage dynamics at the buried BaF2/Si interface: Time resolved laser-pump/synchrotron-probe photoemission.
- Source :
- Applied Physics A: Materials Science & Processing; Aug2007, Vol. 88 Issue 3, p587-592, 6p, 1 Diagram, 4 Graphs
- Publication Year :
- 2007
-
Abstract
- Photon-induced band bending changes and subsequent relaxation at the buried insulator/semiconductor interface of BaF<subscript>2</subscript>/Si(001) have been investigated. This is achieved by creating free charge carriers through absorption of a visible pump laser pulse (λ=532 nm, E=2.33 eV) in the silicon, followed by time resolved photoelectron spectroscopy using vacuum-ultraviolet synchrotron radiation (E=18 eV) as a probe of the BaF<subscript>2</subscript> valence band (VB). Since the excitation takes place in the semiconductor and the probe photoemission signal originates from the BaF<subscript>2</subscript>, the relaxation at the interface has been probed. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09478396
- Volume :
- 88
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Applied Physics A: Materials Science & Processing
- Publication Type :
- Academic Journal
- Accession number :
- 25524314
- Full Text :
- https://doi.org/10.1007/s00339-007-4072-z