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Preparation of different BeTe surface reconstructions by decapping and thermal treatment

Authors :
Nathalie Esser
J. Wagner
Veit Wagner
Patrick Vogt
Georg Schmidt
Lasse H Hansen
W. Richter
J. Geurts
Source :
Journal of Applied Physics. 93:1511-1514
Publication Year :
2003
Publisher :
AIP Publishing, 2003.

Abstract

We report on the application of protective capping layers for nonultrahigh vacuum (UHV) transport of BeTe layers. It allows the subsequent recovery of the clean BeTe(100) surface by thermal decapping in UHV. For capping tellurium/selenium double layers with a thickness of about 0.2 μm are employed. After decapping by annealing which results in the desorption of Se at 150 °C and of Te at 260 °C, the low-energy electron diffraction pattern confirms the reestablishment of (2×1) surface reconstruction of BeTe(100). Subsequent annealing to 520 °C results in (3×1) reconstruction. In situ monitoring by Raman spectroscopy and reflection anisotropy spectroscopy is used to control the decapping process and the subsequent annealing-induced change in surface reconstruction.

Details

ISSN :
10897550 and 00218979
Volume :
93
Database :
OpenAIRE
Journal :
Journal of Applied Physics
Accession number :
edsair.doi...........b0c49935efe12b07000f78c48f1b5464
Full Text :
https://doi.org/10.1063/1.1532932