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O: Fachverband Oberflächenphysik

O 90: Semiconductor Substrates

O 90.8: Talk

Friday, March 15, 2013, 12:15–12:30, H45

STM Observation of Krypton Adsorbed on Graphite — •Raphael Bindel, Tomohiro Matsui, and Hiroshi Fukuyama — Department of Physics, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan

Physisorption of a Krypton monolayer on graphite in the √3x√3R30 commensurate phase is investigated by low-temperature scanning tunneling microscopy (STM) at T<100 mK. Former experiments have shown the visibility of Krypton on Graphite in STM images [1]. We observe the growth of the Kr monolayer directly. Moreover, the Krypton adsorption site is determined to be the hollow site of the Carbon lattice by using the lateral boundary between Graphite and islands of the Krypton commensurate phase. In partial agreement with density functional theory calculations [1], the 4p and 5s-states of the Krypton atoms appeared in STM images recorded at different voltages for the occupied as well as for the unoccupied states.