@article{ShikinVarykhalovPrudnikovaetal.2004, author = {Shikin, A. M. and Varykhalov, Andrei and Prudnikova, G. V. and Adamchuk, V. K. and Gudat, Wolfgang and Rader, Oliver}, title = {Photoemission from stepped W(110) : Initial or final state effect?}, issn = {0031-9007}, year = {2004}, abstract = {The electronic structure of the (110)-oriented terraces of stepped W(331) and W(551) is compared to the one of flat W(110) using angle-resolved photoemission. We identify a surface-localized state which develops perpendicular to the steps into a repeated band structure with the periodicity of the step superlattices. It is shown that a final-state diffraction process rather than an initial-state superlattice effect is the origin of the observed behavior and why it does not affect the entire band structure}, language = {en} } @article{VarykhalovGudatAdamchuketal.2006, author = {Varykhalov, Andrei and Gudat, Wolfgang and Adamchuk, V. K. and Rader, Oliver}, title = {Magic numbers in two-dimensional self-organization of C-60 molecules}, doi = {10.1103/Physrevb.73.241404}, year = {2006}, abstract = {Employing the chemically passive carbon reconstruction W(110)/C-R(15x3) as substrate for deposition of C-60 molecules, we have discovered by scanning tunneling microscopy two-dimensional self-assembly of fullerenes into uniform molecular nanoclusters with "magic" numbers. Our photoemission measurements determine van der Waals forces as the dominating interaction in this self-organizing two-dimensional molecular gas. Based on this, a theoretical determination of the cluster structures in the framework of the Girifalco model gives perfect agreement with the experiment}, language = {en} }