Chen Jing-Zhe et al 2008 Chinese Phys. Lett. 25 1060 doi:10.1088/0256-307X/25/3/069
First Principles Calculation of Universal Conductance Fluctuation in Monatomic Metal Chains
Chen Jing-Zhe1, Zhang Jin1 and Han Ru-Shan1
Show affiliationsCombining the non-equilibrium Green's function method and density functional theory, we provide a first-principle scheme to calculate the universal conductance fluctuation (UCF) in quasi one-dimensional monatomic chains subject to a magnetic field. Our results show that for these monatomic chains, the amplitude of the UCF is much smaller than the previous theoretical prediction for mesoscopic conductors by Lee et al. [Phys. Rev. Lett. 55 (1985) 1622; Phys. Rev. B 35 (1987) 1039] The reason is that the ergodic hypothesis fails in these nanowires due to the confinement of geometry. We ascribe the phenomenon to the flux-dependent density of states fluctuation.
- PACS
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71.15.Mb Density functional theory, local density approximation, gradient and other corrections
72.15.Gd Galvanomagnetic and other magnetotransport effects
72.15.Lh Relaxation times and mean free paths
72.15.Eb Electrical and thermal conduction in crystalline metals and alloys
- Subjects
- Dates
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Issue 3 (March 2008)
Received 7 October 2007
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First Principles Calculation of Universal Conductance Fluctuation in Monatomic Metal Chains
Chen Jing-Zhe et al 2008 Chinese Phys. Lett. 25 1060
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