Spin-blockade spectroscopy of a two-level artificial molecule

Details Spin-blockade spectroscopy of a two-level artificial molecule Spin-blockade spectroscopy of a two-level artificial molecule

2003-01-20

arxiv.org/abs/cond-mat/0301360v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures; revised version with a minor change in Fig.2 and additional inset in Fig.3.;accepted by PRL

Scientific paper

10.1103/PhysRevLett.91.026803

Coulomb and spin blockade spectroscopy investigations have been performed on an electrostatically defined ``artificial molecule'' connected to spin polarized leads. The molecule is first effectively reduced to a two-level system by placing both constituent atoms at a specific location of the level spectrum. The spin sensitivity of the conductance enables us to identify the electronic spin-states of the two-level molecule. We find in addition that the magnetic field induces variations in the tunnel coupling between the two atoms. The lateral nature of the device is evoked to explain this behavior.

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