Electron transport through monovalent atomic wires
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Electron transport through monovalent atomic wires
A1_lee_y_j_2004.pdf
(Aalto University - Aaltodoc)
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
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Language |
English |
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Series | Physical Review B |
Subjects | |
ISSN |
1550-235X (electronic) |
DOI | 10.1103/physrevb.69.125409 |