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

Jai Singh, N. Itoh

Research output: Contribution to journalComment/debate

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.
Original languageEnglish
Pages (from-to)427-433
Number of pages7
JournalApplied Physics A: Solids and Surfaces
Volume51
Issue number5
DOIs
Publication statusPublished - 1990

Fingerprint

Dive into the research topics of 'Microscopic theory of desorption of neutral atoms due to high excitonic density at the surfaces of III-V compounds'. Together they form a unique fingerprint.

Cite this