Local moment formation in quantum point contacts.

نویسندگان

  • Kenji Hirose
  • Yigal Meir
  • Ned S Wingreen
چکیده

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.

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عنوان ژورنال:
  • Physical review letters

دوره 90 2  شماره 

صفحات  -

تاریخ انتشار 2003