Issue |
Europhys. Lett.
Volume 64, Number 3, November 2003
|
|
---|---|---|
Page(s) | 364 - 370 | |
Section | Condensed matter: structure, mechanical and thermal properties | |
DOI | https://doi.org/10.1209/epl/i2003-00203-9 | |
Published online | 01 November 2003 |
Multilayer thermal expansion of
determined from
surface core level shifts
1
Sincrotrone Trieste S.C.p.A. - S.S. 14 km 163.5, 34012 Trieste, Italy
2
Dipartimento di Fisica, Università di Trieste - Via Valerio 2, 34127 Trieste, Italy
3
Laboratorio TASC-INFM - S.S. 14 km 163.5, 34012 Trieste, Italy
4
Department of Physics, University of New Hampshire - Durham, NH 03824, USA
5
Institute for Storage Ring Facilities, University of Aarhus DK-8000 Aarhus C, Denmark
6
Scuola Internazionale Superiore di Studi Avanzati (SISSA) and INFM Via Beirut 2-4, I-34014, Trieste, Italy
Received:
27
May
2003
Accepted:
25
August
2003
We have determined the thermal expansion of the first three
interlayer spacings of by comparing measured
temperature-dependent surface core level shifts and surface state
positions to values calculated with Density Functional Theory for
different surface geometries. Our results reveal that, in the
temperature range from 300 to 700
, the 1st-to-2nd, 2nd-to-3rd
and 3rd-to-4th interlayer coefficient of thermal expansion are
,
and
,
respectively. We have now set
as a challenge for
further theoretical improvements, since a complete theoretical
understanding of surface thermal expansion does not exist.
PACS: 68.35.Bs – Structure of clean surfaces (reconstruction) / 65.40.De – Thermal expansion; thermomechanical effects / 79.60.Bm – Clean metal, semiconductor, and insulator surfaces
© EDP Sciences, 2003
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