Frantzeskakis Emmanouil, Pons Stéphane, Mirhosseini Hossein, Henk Jürgen, Ast Christian R, Grioni Marco
Laboratoire de Spectroscopie Electronique, Institut de Physique des Nanostructures, Ecole Polytechnique Fédérale de Lausanne (EPFL), station 3, CH-1015 Lausanne-Switzerland.
Phys Rev Lett. 2008 Nov 7;101(19):196805. doi: 10.1103/PhysRevLett.101.196805.
We have studied the interplay of a giant spin-orbit splitting and of quantum confinement in artificial Bi-Ag-Si trilayer structures. Angle-resolved photoelectron spectroscopy reveals the formation of a complex spin-dependent gap structure, which can be tuned by varying the thickness of the Ag buffer layer. This provides a means to tailor the electronic structure at the Fermi energy, with potential applications for silicon-compatible spintronic devices.
