Local moment formation in quantum point contacts Academic Article uri icon


  • Abstract 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 on site Coulomb- interaction energy remains almost constant.

publication date

  • January 1, 2003