title: Tunable spin gaps in a quantum-confined geometry.
abstract: 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.
authors.affiliation: Laboratoire de Spectroscopie Electronique, Institut de Physique des Nanostructures, Ecole Polytechnique Fédérale de Lausanne (EPFL), station 3, CH-1015 Lausanne-Switzerland.
authors.forename: Emmanouil
authors.initials: E
authors.lastname: Frantzeskakis
authors.forename: Stéphane
authors.initials: S
authors.lastname: Pons
authors.forename: Hossein
authors.initials: H
authors.lastname: Mirhosseini
authors.forename: Jürgen
authors.initials: J
authors.lastname: Henk
authors.forename: Christian R
authors.initials: CR
authors.lastname: Ast
authors.forename: Marco
authors.initials: M
authors.lastname: Grioni