Inter-valley scattering induced by Coulomb interaction and disorder in carbon-nanotube quantum dots

Abstract

We develop a theory of inter-valley Coulomb scattering in semiconducting carbon-nanotube quantum dots, taking into account the effects of curvature and chirality. Starting from the effective-mass description of single-particle states, we study the two-electron system by fully including Coulomb interaction, spin-orbit coupling, and short-range disorder. We find that the energy level splittings associated with inter-valley scattering are nearly independent of the chiral angle and, while smaller than those due to spin-orbit interaction, large enough to be measurable.

Revised version with a largely expanded discussion of experiments. To appear in Physical Review B

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Cited by in corpus (16)

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• Interplay of Kondo effect and strong spin-orbit coupling in multi-hole ultraclean carbon nanotubes
• Three interacting atoms in a one-dimensional trap: A benchmark system for computational approaches
• Wigner localization in a graphene quantum dot with a mass gap
• Shape-sensitive Pauli blockade in a bent carbon nanotube
• Anomalous magnetization of a carbon nanotube as an excitonic insulator
• Spin and valley manipulation in single and double electrostatic silicene quantum dots
• Double quantum dots defined in bilayer graphene
• Current hot spot in the spin-valley blockade in carbon nanotubes
• Intra- and inter-shell Kondo effects in carbon nanotube quantum dots
• Spin-valley dynamics of electrically driven ambipolar carbon-nanotube quantum dots
• Two-electron n-p double quantum dots in carbon nanotubes
• Electronic structure of (1e,1h) states of carbon nanotube quantum dots
• Nagaoka spin-valley ordering in silicene quantum dots
• Electrically tunable quantum interfaces between photons and spin qubits in carbon nanotube quantum dots
• Inter- and intra-band Coulomb interactions between holes in silicon nanostructures