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Anomalous As desorption from InAs(100) 2×4 (1993)

Sasaoka, C. ; Kato, Y. ; Usui, A.

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 62 (1993), S. 2338-2340

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ISSN: 1077-3118

Source: AIP Digital Archive

Topics: Physics

Notes: Arsenic desorption from the InAs(100) 2×4 surface is investigated through temperature programmed desorption (TPD), isothermal desorption, and reflection high-energy electron diffraction. TPD area analysis indicates that the As coverage, θAs, of the InAs 2×4 structure is 0.7 monolayers. The As TPD spectrum shows two desorption features; a broad tail from 300 to 400 °C and a distinct peak at 430 °C. The 430 °C peak is well described in terms of a first-order-desorption kinetics with a preexponential factor ν of 1.5×1019 s−1. This extremely high ν value explains well the narrow window of optimal molecular beam epitaxy growth conditions for InAs.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.109410

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