Hysteresis in phase transitions at clean and Au-covered Si(111) surfaces
- 15 April 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 47 (15) , 9903-9906
- https://doi.org/10.1103/physrevb.47.9903
Abstract
By measuring the temperature dependence of the superlattice-spot intensity in reflection high-energy electron diffraction from a clean Si(111) surface during the phase transition between 7×7 and 1×1 structures, a hysteresis was found with a temperature difference of 5 °C between heating and cooling processes. We conclude that a first-order phase transition is present. Hysteresis was barely observed for the (5×2 or √3 × √3 )-1×1 phase transitions of Au-induced superstructures.Keywords
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