Large oscillating non-local voltage in multi-terminal single wall carbon nanotube devices

Abstract

We report on the observation of a non-local voltage in a ballistic one-dimensional conductor, realized by a single-wall carbon nanotube with four contacts. The contacts divide the tube into three quantum dots which we control by the back-gate voltage $V_g$. We measure a large \emph{oscillating} non-local voltage $V_{nl}$ as a function of $V_g$ with zero mean. Though a classical resistor model can account for a non-local voltage including change of sign, it fails to describe the magnitude properly. The large amplitude of $V_{nl}$ is due to quantum interference effects and can be understood within the scattering-approach of electron transport.

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Cited by in corpus (8)

• Carbon nanotubes in electric and magnetic fields
• Permalloy-based carbon nanotube spin-valve
• Conserved spin and orbital phase along carbon nanotubes connected with multiple ferromagnetic contacts
• Nonlocal spin transport in single walled carbon nanotube networks
• Proposal for the observation of nonlocal multipair production: the biSQUID
• Spin dependent quantum interference in non-local graphene spin valves
• Multi-terminal spin-dependent transport in ballistic carbon nanotubes
• Four-terminal voltage fluctuations in disordered graphene nanoribbons: Anderson and anomalous localization effects