Spin States in Graphene Quantum Dots

Details Spin States in Graphene Quantum Dots Spin States in Graphene Quantum Dots

2010-02-19

arxiv.org/abs/1002.3771v1

Phys. Rev. Lett. 105, 116801 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevLett.105.116801

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 ground state energy as a function of a magnetic field. For a magnetic field in-plane of the quantum dot the Zemann 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 for graphene.

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