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Direct Observation of a Surface Phase Transition by hot Tunneling Microscopy

Published online by Cambridge University Press:  25 February 2011

Ing-Shouh Hwang
Affiliation:
Department of Physics and Division of Applied Sciences, Harvard University, Cambridge, MA 02138
Jene A. Golovchenko
Affiliation:
Department of Physics and Division of Applied Sciences, Harvard University, Cambridge, MA 02138
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Abstract

We study a reversible phase transition of one monolayer of Pb on a Ge(l11) surface over a range of temperature from below to above the transition temperature (∼175°C) with the tunneling microscope. The high temperature l×1 phase is a ordered monolayer l×l 2D solid. Below the transition temperature, Pb atoms are displaced from their ideal T1 positions to form trimers with periodicity.

Type
Research Article
Copyright
Copyright © Materials Research Society 1993

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