Journal article
Electron transport through monovalent atomic wires
Aalto University1
Theoretical Nanoelectronics Group, Theory Section, Department of Micro- and Nanotechnology, Technical University of Denmark2
Theory Section, Department of Micro- and Nanotechnology, Technical University of Denmark3
Department of Micro- and Nanotechnology, Technical University of Denmark4
Using a first-principles density-functional method we model electron transport through linear chains of monovalent atoms between two bulk electrodes. For noble-metal chains the transport resembles that for free electrons over a potential barrier whereas for alkali-metal chains resonance states at the chain determine the conductance.
As a result, the conductance for noble-metal chains is close to one quantum of conductance, and it oscillates moderately so that an even number of chain atoms yields a higher value than an odd number. The conductance oscillations are large for alkali-metal chains and their phase is opposite to that of noble-metal chains.
Language: | English |
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Year: | 2004 |
ISSN: | 10953795 , 1550235x , 01631829 and 10980121 |
Types: | Journal article |
DOI: | 10.1103/PhysRevB.69.125409 |
ORCIDs: | Brandbyge, Mads |