Molecular electronics: Some views on transport junctions and beyond
摘要：
The field of molecular electronics comprises a fundamental set of issues concerning the electronic response of molecules as parts of a mesoscopic structure and a technology-facing area of science. We will overview some important aspects of these subfields. The most advanced ideas in the field involve the use of molecules as individual logic or memory units and are broadly based on using the quantum state space of the molecule. Current work in molecular electronics usually addresses molecular junction transport, where the molecule acts as a barrier for incoming electrons: This is the fundamental Landauer idea of "conduction as scattering" generalized to molecular junction structures. Another point of view in terms of superexchange as a guiding mechanism for coherent electron transfer through the molecular bridge is discussed. Molecules generally exhibit relatively strong vibronic coupling. The last section of this overview focuses on vibronic effects, including inelastic electron tunneling spectroscopy, hysteresis in junction charge transport, and negative differential resistance in molecular transport junctions.
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关键词：
NEGATIVE DIFFERENTIAL RESISTANCE SINGLE-MOLECULE ORGANIC-MOLECULES TUNNELING SPECTROSCOPY CONDUCTANCE MICROSCOPY SURFACES WIRE NANOSTRUCTURES TRANSMISSION
DOI：
10.1073/pnas.0500075102
被引量：
年份：
2005
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