Sagnac interference in Carbon nanotube loops

Abstract

In this paper we study electron interference in nanotube loops. The conductance as a function of the applied voltage is shown to oscillate due to interference between electron beams traversing the loop in two opposite directions, with slightly different velocities. The period of these oscillations with respect to the gate voltage, as well as the temperatures required for the effect to appear, are shown to be much larger than those of the related Fabry-Perot interference. This effect is analogous to the Sagnac effect in light interferometers. We calculate the effect of interactions on the period of the oscillations, and show that even though interactions destroy much of the near-degeneracy of velocities in the symmetric spin channel, the slow interference effects survive.

5 pages, 4 figures

References in corpus (16)

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Cited by in corpus (8)

• Effects of geometric frustration in Kitaev chains
• Topological phases of a Kitaev tie
• Sagnac Rotational Phase Shifts in a Mesoscopic Electron Interferometer with Spin-Orbit Interactions
• Sagnac interference in Carbon nanotubes
• Scattering of plasmons at the intersection of two metallic nanotubes: Implications for tunnelling
• Sagnac Electron Interference as a Probe of Electronic Structure
• Accessing nanotube bands via crossed electric and magnetic fields
• Topological squashed entanglement: nonlocal order parameter for one-dimensional topological superconductors