Berlin 2015 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 104: Transport: Molecular electronics (TT with CPP/HL/MA/O)

HL 104.11: Talk

Friday, March 20, 2015, 12:15–12:30, H 0110

Quantum interference in dangling bond loops — •Andrii Kleshchonok, Rafael Gutiérrez, and Gianaurelio Cuniberti — Institute for Materials Science, Dresden University of Technology, Hallwachstr. 3, 01069 Dresden, Germany

Dangling bonds can be produced with atomic precision by selectively removing hydrogen atoms from a Si passivated surface with a scanning tunneling microscope (STM). Dangling bond wires (DBW) and dangling bond loops open fascinating possibilities for becoming the building bocks of novel planar, atomic-scale electronic circuits and logic elements. We perform a realistic study of transport properties of the DBW connected to the carbon nanoribbon leads and quantum interference effects in DBW loops by combining density-functional based approaches with equilibrium and non-equilibrium Green function methods. We develop methodology to study different topologies (half row, full row, zigzag), length of the loops, lead coupling strength and position.