Gast ::
| Hauptseite > Publikationsdatenbank > Probing relaxation times in graphene quantum dots |
| Hauptseite > Publikationsdatenbank > Probing relaxation times in graphene quantum dots |
| Journal Article | FZJ-2015-02801 |
; ; ; ; ; ; ;
2013
Nature Publishing Group
London
This record in other databases: 
Please use a persistent id in citations: http://hdl.handle.net/2128/24464 doi:10.1038/ncomms2738
Abstract: Graphene quantum dots are attractive candidates for solid-state quantum bits. In fact, the predicted weak spin-orbit and hyperfine interaction promise spin qubits with long coherence times. Graphene quantum dots have been extensively investigated with respect to their excitation spectrum, spin-filling sequence and electron-hole crossover. However, their relaxation dynamics remain largely unexplored. This is mainly due to challenges in device fabrication, in particular concerning the control of carrier confinement and the tunability of the tunnelling barriers, both crucial to experimentally investigate decoherence times. Here we report pulsed-gate transient current spectroscopy and relaxation time measurements of excited states in graphene quantum dots. This is achieved by an advanced device design that allows to individually tune the tunnelling barriers down to the low megahertz regime, while monitoring their asymmetry. Measuring transient currents through electronic excited states, we estimate a lower bound for charge relaxation times on the order of 60–100 ns.
; 
; BIOSIS Previews ; Current Contents - Agriculture, Biology and Environmental Sciences ; Current Contents - Life Sciences ; Current Contents - Physical, Chemical and Earth Sciences ; IF >= 10 ; JCR ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection ; Zoological Record
|
The record appears in these collections: |
PDF
PDF (PDFA)