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Electronic properties of Ge dangling bond centers at Si1-xGex/SiO2 interfaces.
- Source :
-
Applied Physics Letters . 11/30/2009, Vol. 95 Issue 22, p222106. 3p. 1 Black and White Photograph, 3 Graphs. - Publication Year :
- 2009
-
Abstract
- Comparison between densities of paramagnetic Ge dangling bond defects and shallow acceptor traps at interfaces of the condensation-grown Si1-xGex layers (0.28≤x≤0.93) with thermal SiO2 as a function of Ge fraction, x, reveals quantitative agreement. Moreover, defect densities detected in both magnetic resonance and electrical experiments exhibit reversible passivation-depassivation behavior with respect to hydrogen indicating observation of the same defect (Ge Pb1 center). The corresponding energy level is estimated to lie at 0.35±0.10 eV above the valence band in bulk Si, which makes these defects behave as shallow acceptors in Ge-rich Si1-xGex. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 95
- Issue :
- 22
- Database :
- Academic Search Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 45610551
- Full Text :
- https://doi.org/10.1063/1.3266853