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Electron orbital valves made of multiply connected armchair carbon nanotubes with mirror-reflection symmetry: tight-binding study

Gunn Kim·Sang Bong Lee·Hoonkyung Lee·Jisoon Ihm
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Abstract

Using the tight-binding method and the Landauer-Büttiker conductance formalism, we demonstrate that a multiply connected armchair carbon nanotube with a mirror-reflection symmetry can sustain an electron current of the $π$-bonding orbital while suppress that of the $π$-antibonding orbital over a certain energy range. Accordingly, the system behaves like an electron orbital valve and may be used as a scanning tunneling microscope to probe pairing symmetry in d-wave superconductors or even orbital ordering in solids which is believed to occur in some transition-metal oxides.

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Gunn Kim, Sang Bong Lee, Hoonkyung Lee, Jisoon Ihm. 2006-12-18. Electron orbital valves made of multiply connected armchair carbon nanotubes with mirror-reflection symmetry: tight-binding study. https://doi.org/10.1088/0953-8984%2F19%2F2%2F026217

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