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Microscopic theory of desorption of neutral atoms due to high excitonic density at the surfaces of III-V compounds

Singh, Jai and Itoh, N. (1990). Microscopic theory of desorption of neutral atoms due to high excitonic density at the surfaces of III-V compounds. Applied Physics A: Solids and Surfaces,51(5):427-433.

Document type: Journal Article
Citation counts: Scopus Citation Count Cited 3 times in Scopus Article | Citations

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Title Microscopic theory of desorption of neutral atoms due to high excitonic density at the surfaces of III-V compounds
Author Singh, Jai
Itoh, N.
Journal Name Applied Physics A: Solids and Surfaces
Publication Date 1990
Volume Number 51
Issue Number 5
ISSN 0721-7250   (check CDU catalogue  open catalogue search in new window)
Scopus ID 2-s2.0-0000460752
Start Page 427
End Page 433
Total Pages 7
Place of Publication Germany
Publisher Springer-Verlag
Field of Research PHYSICAL SCIENCES
Abstract A microscopic theory of desorption of neutral atoms from the surface of crystalline GaP is presented. Derived results suggest that bonds are broken at the surface due to high excitonic density, so that a pair of excited holes can get localised on the same bond because such an excited state has much lower energy than that of a free exciton state. Any bond with a pair of holes, instead of covalent electrons, will be broken. Strong exciton-lattice interaction is assumed. It is argued that the mechanism of atomic desorption from surfaces is analogous to that of polymer ablation; and the desorption of neutral atoms increases linearly to super linearly with the increase in laser fluence. This agrees well with experiments.
Keywords 72.90
73.20
73.90
DOI http://dx.doi.org/10.1007/BF00348385   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
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Created: Fri, 29 Aug 2014, 20:28:37 CST by Anthony Hornby