Regensburg 2019 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 12: Nanostructures at Surfaces II: Designer Structures and Surfaces

O 12.4: Vortrag

Montag, 1. April 2019, 16:00–16:15, H15

X-ray Photoelectron Diffraction and Spectroscopic Investigation of Near-Surface Alloying of Cu/Au(111)
— •David Batchelor1, Federico Grillo2, Rory Megginson2, Matthias Muntwiler3, and Christopher J. Baddeley21KIT, Karlsruhe, Germany — 2University of St Andrews, St. Andrews, United Kingdom — 3PSI, Villigen, Switzerland

Binary metal alloys have been, and are, the subject of much investigation. The Copper/Gold System is one such well studied bulk system. The solid alloy is completely miscible over the whole concentration range and a large temperature region, only becoming ordered at low temperature (≈650K). In comparison there are relatively few Surface studies. Recently, it has been demonstrated using STM [1,2] that ordered Surface structures can be grown for this system. To investigate the structures further a Synchrotron Radiation and STM study on the PEARL beamline [3] at the SLS was undertaken. X-ray Photoelectron diffraction was chosen as method as it is not only sensitive to the Surface but also buried layers. In addition to the geometric structure data electronic state information from both valence and core levels was obtained. The data will be discussed together with the results of calculations and modelling.

F. Grillo et al., New J. Phys., 13, 013044 (2011)
F. Grillo et al., e-JSSNT, 16, 163 (2018)
M. Muntwiler et al. J. Synchrotron Rad. 24, 354 (2017)

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