Structural origin of the Sn 4d core level line shape in Sn/Ge(111)-(3 x 3)



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Tejeda, A. and Cortés, R and Lobo Checa, J. and Didiot, C. and Kierren, B and Malterre, D. and Michel, E. G. and Mascaraque Susunaga, Arantzazu (2008) Structural origin of the Sn 4d core level line shape in Sn/Ge(111)-(3 x 3). Physical Review Letters, 100 (2). ISSN 0031-9007

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High-resolution photoemission of the Sn 4d core level of Sn/Ge(111)-(3x3) resolves three main components in the line shape, which are assigned to each of the three Sn atoms that form the unit cell. The line shape found is in agreement with an initial state picture and supports that the two down atoms are inequivalent. In full agreement with these results, scanning tunnel microscopy images directly show that the two down atoms are at slightly different heights in most of the surface, giving rise to an inequivalent-down-atoms (3x3) structure. These results solve a long-standing controversy on the interpretation of the Sn 4d core-level line shape and the structure of Sn/Ge(111)-(3x3).

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© 2008 The American Physical Society.
We thank J. M. Rojo for fruitful discussions. This work was supported by MEC and CAM (Spain) (Grants No. FIS2006-04552, No. FIS2005-00747, and No. and European Social Fund). Part of this work was performed at the Swiss Light Source, Villigen, Switzerland.

Uncontrolled Keywords:Dynamical fluctuations, Phase-transitions, Low-temperature, Surface phase, Stm
Subjects:Sciences > Physics > Materials
ID Code:28335
Deposited On:16 Feb 2015 11:39
Last Modified:18 Mar 2015 09:25

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