Volume 119, Number 1, July 2017
|Number of page(s)||6|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||13 September 2017|
Determination of the line tension based on shape fluctuations of medium-sized vacancy islands on Ag(100)
Chair of Physical Chemistry I, Ruhr Universität Bochum - Universitätsstr. 150, D-44801 Bochum, Germany
Received: 19 January 2017
Accepted: 19 August 2017
A variable temperature fast-scanning tunneling microscope is used to investigate the shape fluctuations of medium-sized two-dimensional vacancy islands on Ag(100) in the size range from ≈ 10 to ≈ 50 atoms and within a temperature range between 165 K and 177 K. Based on the theory of equilibrium fluctuations, the average step stiffness is determined to be . Our study extends the applicability of the shape fluctuation method down to surprisingly small vacancy island sizes.
PACS: 68.37.Ef – Scanning tunneling microscopy (including chemistry induced with STM) / 68.47.De – Metallic surfaces / 68.55.Ln – Defects and impurities: doping, implantation, distribution, concentration, etc.
© EPLA, 2017
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