k<sub>∥</sub>-resolved electronic structure of quasi-free 2-dimensional HfS<sub>2</sub> clusters
C. Kreis; M. Traving; R. Adelung; L. Kipp; M. Skibowski; C. Kreis; Institut für Experimentelle und Angewandte Physik, Universität Kiel D-24118 Kiel, Germany; M. Traving; Institut für Experimentelle und Angewandte Physik, Universität Kiel D-24118 Kiel, Germany; R. Adelung; Institut für Experimentelle und Angewandte Physik, Universität Kiel D-24118 Kiel, Germany; L. Kipp; Institut für Experimentelle und Angewandte Physik, Universität Kiel D-24118 Kiel, Germany; M. Skibowski; Institut für Experimentelle und Angewandte Physik, Universität Kiel D-24118 Kiel, Germany
Журнал:
EPL (Europhysics Letters)
Дата:
2000-10-15
Аннотация:
Employing van der Waals epitaxy we grow quasi-free 2-dimensional clusters of layered materials. The weak coupling between the layers enables the clusters to reveal their intrinsic properties undisturbed by the underlying substrate. Their orientations being well ordered allow k<sub>∥</sub>-resolved measurements. Applying angle-resolved photoemission in combination with scanning tunneling microscopy to the same samples allows to study the evolution of the electronic structure with increasing cluster size. For 2D HfS<sub>2</sub> clusters grown on WSe<sub>2</sub> we demonstrate that k<sub>∥</sub> dispersion already occurs for cluster diameters of ≈ 100 nm.
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