Singlet-Triplet Physics and Shell Filling in Carbon Nanotube Double Quantum Dots

Simple item page
dc.creatorJørgensen, H. Ingerslev
dc.creatorGrove-Rasmussen, K.
dc.creatorWang, K. -Y.
dc.creatorBlackburn, A. M.
dc.creatorFlensberg, K.
dc.creatorLindelof, P. E.
dc.creatorWilliams, D. A.
dc.date2007-11-21
dc.date.accessioned2026-07-07T12:20:42Z
dc.date.available2026-07-07T12:20:42Z
dc.descriptionAn artifcial two-atomic molecule, also called a double quantum dot (DQD), is an ideal system for exploring few electron physics. Spin-entanglement between just two electrons can be explored in such systems where singlet and triplet states are accessible. These two spin-states can be regarded as the two states in a quantum two-state system, a so-called singlet-triplet qubit. A very attractive material for realizing spin based qubits is the carbon nanotube (CNT), because it is expected to have a very long spin coherence time. Here we show the existence of a gate-tunable singlet-triplet qubit in a CNT DQD. We show that the CNT DQD has clear shell structures of both four and eight electrons, with the singlet-triplet qubit present in the four-electron shells. We furthermore observe inelastic cotunneling via the singlet and triplet states, which we use to probe the splitting between singlet and triplet, in good agreement with theory.
dc.descriptionSupplement available at: http://www.fys.ku.dk/~hij/public/singlet-triple_supp.pdf
dc.identifierhttps://arxiv.org/abs/0711.3245
dc.identifierhttp://arxiv.org/abs/0711.3245
dc.identifierNature Physics 4, 536 - 539 (2008)
dc.identifierdoi:10.1038/nphys987
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/213142
dc.subjectMesoscale and Nanoscale Physics
dc.titleSinglet-Triplet Physics and Shell Filling in Carbon Nanotube Double Quantum Dots
dc.typetext

Files

Collections

arXiv