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Theoretical Study Of Electron Transport In Boron Nanotubes, Kah Chun Lau, Ravindra Pandey, Ranjit Pati
Theoretical Study Of Electron Transport In Boron Nanotubes, Kah Chun Lau, Ravindra Pandey, Ranjit Pati
Department of Physics Publications
The electron transport in single-walled boron nanotube (BNT) is studied using the Landauer-Büttiker [R. Landauer, J. Phys.: Condens: Matter 1, 8099 (1989); M. Büttiker, Phys. Rev. Lett. 57, 1761 (1986)] multichannel approach in conjunction with the tight-binding method. In the range of the calculated length (1-5.0 nm) of the tubes, the calculations predict a ballistic transport in BNT and find a relatively low resistance for BNTs as compared to that of the single-walled carbon nanotubes (CNTs) of comparable length. A lower resistance in the case of BNT than the CNT may be attributed to electron-deficient nature of boron …
Spin-Polarized Electron Transport Of A Self-Assembled Organic Monolayer On A Ni(111) Substrate: An Organic Spin Switch, Haiying Liu, Ravindra Pandey, Ranjit Pati, Shashi P. Karna
Spin-Polarized Electron Transport Of A Self-Assembled Organic Monolayer On A Ni(111) Substrate: An Organic Spin Switch, Haiying Liu, Ravindra Pandey, Ranjit Pati, Shashi P. Karna
Department of Physics Publications
Using density functional theory and the Bardeen, Tersoff, and Hamann formalism we have calculated spin-polarized electron transport in a system involving a nonbonded magnetic probe tip and a self-assembled monolayer (SAM) of benzene-1,4-dithiol on a Ni(111) substrate. A significantly higher tunneling current is obtained for a configuration in which the spin of the probe tip is aligned parallel to that of the substrate than for a configuration with antiparallel alignment—an effect prerequisite for an organic spin switch.