Spin states in graphene quantum dots.
- Güttinger J Solid State Physics Laboratory, ETH Zurich, 8093 Zurich, Switzerland. guettinj@phys.ethz.ch
- Frey T
- Stampfer C
- Ihn T
- Ensslin K
- 2010-09-28
Published in:
- Physical review letters. - 2010
English
We investigate ground and excited state transport through small (d≈70 nm) graphene quantum dots. The successive spin filling of orbital states is detected by measuring the difference between ground-state energies as a function of a magnetic field. For a magnetic field in-plane of the quantum dot the Zeeman splitting of spin states is measured. The results are compatible with a g factor of 2, and we detect a spin-filling sequence for a series of states which is reasonable given the strength of exchange interaction effects expected by comparing Coulomb interaction energy and kinetic energy of charge carriers in graphene.
- Language
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- English
- Open access status
- green
- Identifiers
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- DOI 10.1103/PhysRevLett.105.116801
- PMID 20867593
- Persistent URL
- https://sonar.ch/global/documents/40436
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