Quantum confinement between self-organized Pt nanowires on Ge(001).
The existence of one-dimensional (1D) electronic states between self-organized Pt nanowires spaced 1.6 or 2.4 nm apart on a Ge(001) surface is revealed by low-temperature scanning tunneling microscopy. These perfectly straight Pt nanowires act as barriers for a surface state (located just below the Fermi level) of the underlying terrace. The energy positions of the 1D electronic states are in good agreement with the energy levels of a quantum particle in a well. Spatial maps of the differential conductivity of the 1D electronic states conclusively reveal that these states are exclusively present in the troughs between the Pt nanowires.
Oncel
Nuri
N
Solid State Physics, MESA+ Research Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
van Houselt
Arie
A
Huijben
Jeroen
J
Hallbäck
Ann-Sofie
AS
Gurlu
Oguzhan
O
Zandvliet
Harold J W
HJ
Poelsema
Bene
B