Szczegóły publikacji

Opis bibliograficzny

Autorzy (4)

• AGHOsika Edyta
• Chacón Alexis
• Lewenstein Maciej
• AGHSzafran Bartłomiej

Słowa kluczowe

Dane bibliometryczne

ID BaDAP	106674
Data dodania do BaDAP	2017-07-13
Tekst źródłowy	URL
DOI	10.1088/1361-648X/aa720e
Rok publikacji	2017
Typ publikacji	artykuł w czasopiśmie
Otwarty dostęp
Czasopismo/seria	Journal of Physics-Condensed Matter

Abstract

An ambipolar n–p double quantum dot defined by potential variation along a semiconducting carbon-nanotube is considered. We focus on the (1e,1h) charge configuration with a single excess electron of the conduction band confined in the n-type dot and a single missing electron in the valence band state of the p-type dot for which lifting of the Pauli blockade of the current was observed in the electric-dipole spin resonance (Laird et al 2013 Nat. Nanotechnol. 8 565). The dynamics of the system driven by periodic electric field is studied with the Floquet theory and the time-dependent configuration interaction method with the single-electron spin-valley-orbitals determined for atomistic tight-binding Hamiltonian. We find that the transitions lifting the Pauli blockade are strongly influenced by coupling to a vacuum state with an empty n dot and a fully filled p dot. The coupling shifts the transition energies and strongly modifies the effective g factors for axial magnetic field. The coupling is modulated by the bias between the dots but it appears effective for surprisingly large energy splitting between the (1e,1h) ground state and the vacuum (0e, 0h) state. Multiphoton transitions and high harmonic generation effects are also discussed.

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