Local moment formation in quantum point contacts

Details Local moment formation in quantum point contacts Local moment formation in quantum point contacts

2002-11-27

arxiv.org/abs/cond-mat/0211641v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 3 figures, accepted for publication in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.90.026804

Spin-density-functional theory of quantum point contacts (QPCs) reveals the
formation of a local moment with a net of one electron spin in the vicinity of
the point contact - supporting the recent report of a Kondo effect in a QPC.
The hybridization of the local moment to the leads decreases as the QPC becomes
longer, while the onsite Coulomb-interaction energy remains almost constant.

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