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