Ultrathin (1x2)-Sn layer on GaAs(100) and InAs(100) substrates: A catalyst for removal of amorphous surface oxides
Artikel i vetenskaplig tidskrift, 2011

Amorphous surface oxides of III-V semiconductors are harmful in many contexts of device development. Using low-energy electron diffraction and photoelectron spectroscopy, we demonstrate that surface oxides formed at Sn-capped GaAs(100) and InAs(100) surfaces in air are effectively removed by heating. This Sn-mediated oxide desorption procedure results in the initial well-defined Sn-stabilized (1x2) surface even for samples exposed to air for a prolonged time. Based on ab initio calculations we propose that the phenomenon is due to indirect and direct effects of Sn. The Sn-induced surface composition weakens oxygen adsorption.





molecular-beam epitaxy



P. Laukkanen

Turun Yliopisto

Tammerfors tekniska universitet

M. P. J. Punkkinen

Russian Academy of Sciences

Kungliga Tekniska Högskolan (KTH)

Turun Yliopisto

J. Lang

Turun Yliopisto

M. Tuominen

Turun Yliopisto

M. Kuzmin

Lunds universitet

Turun Yliopisto

V. Tuominen

Turun Yliopisto

J. Dahl

Turun Yliopisto

Johan Adell

Polish Academy of Sciences

J. Sadowski

Polish Academy of Sciences

Janusz Kanski

Chalmers, Teknisk fysik, Fasta tillståndets fysik

V. Polojarvi

Tammerfors tekniska universitet

J. Pakarinen

Teknologian Tutkimuskeskus (VTT)

K. Kokko

Turun Yliopisto

M. Guina

Tammerfors tekniska universitet

M. Pessa

Tammerfors tekniska universitet

I. J. Vayrynen

Turun Yliopisto

Applied Physics Letters

0003-6951 (ISSN) 1077-3118 (eISSN)

Vol. 98 23 231908


Annan teknik



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