Bias-dependent oscillatory electron transport of monatomic sulfur chains
Citation:
Jing-Xin Yu, Yan Cheng, Stefano Sanvito and Xiang-Rong Chen, Bias-dependent oscillatory electron transport of monatomic sulfur chains, Applied Physics Letters, 100, 10, 2012, 103110-Download Item:
ApplPhysLett_100_103110.pdf (Published (publisher's copy) - Peer Reviewed) 1.128Mb
Abstract:
The bias-dependent oscillatory electron transport of monatomic sulfur chains sandwiched between gold electrodes is investigated with density functional theory and non-equilibrium Green's function method. At zero bias, in contrast to the typical odd-even oscillations observed in most metallic chains, we find that the conductance oscillates with a period of four atoms. However, as the bias voltage is increased the current displays a two-atom periodicity. This emerges gradually, first for the longer chains and then, at voltages larger than 0.7 V, for lengths. The oscillatory behaviors are analyzed by the density of states and the energy-dependent and bias-dependent transmission coefficients.
Sponsor
Grant Number
Science Foundation Ireland (SFI)
G20267
Author's Homepage:
http://people.tcd.ie/sanvitosDescription:
PUBLISHED
Author: SANVITO, STEFANO
Type of material:
Journal ArticleCollections:
Series/Report no:
Applied Physics Letters100
10
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Full text availableKeywords:
bias-dependent transmission coefficientsSubject (TCD):
Nanoscience & MaterialsDOI:
http://dx.doi.org/10.1063/1.3693380Licences: