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6 papers · 2 filters
Manipulation of Kondo Effect via Two-Dimensional Molecular Self-Assembly
Violeta Iancu, Aparna Deshpande, Saw-Wai Hla*
We report manipulation of a Kondo resonance originated from the spin-electron interactions between a two-dimensional molecular assembly of TBrPP-Co molecules and a Cu(111) surface…
Atom-by-atom extraction using scanning tunneling microscope tip-cluster interaction
A. Deshpande, H. Yildirim, A. Kara +4
We investigate atomistic details of a single atom extraction process realized by using scanning tunneling microscope (STM) tip-cluster interaction on a Ag(111) surface at 6 K. Sing…
Thermally stimulated H emission and diffusion in hydrogenated amorphous silicon
T. A. Abtew, F. Inam, D. A. Drabold
We report first principles ab initio density functional calculations of hydrogen dynam- ics in hydrogenated amorphous silicon. Thermal motion of the host Si atoms drives H diffusio…
Hydrogen dynamics and light-induced structural changes in hydrogenated amorphous silicon
T. A. Abtew, D. A. Drabold
We use accurate first principles methods to study the network dynamics of hydrogenated amorphous silicon, including the motion of hydrogen. In addition to studies of atomic dynamic…
Manipulating Kondo Temperature via Single Molecule Switching
Violeta Iancu, Aparna Deshpande, Saw -Wai Hla
Two conformations of isolated single TBrPP-Co molecules on a Cu(111) surface are switched by applying +2.2 V voltage pulses from a scanning tunneling microscope tip at 4.6 K. The T…
Spin polarization control by electric field gradients
Dan Csontos, Sergio E. Ulloa
We show that the propagation of spin polarized carriers may be dramatically affected by {\em inhomogeneous} electric fields. Surprisingly, the spin diffusion length is found to str…