Physical Review Letters
17 January 2003
Phys.
Rev. Lett. 90, 026804 (2003)
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Local
Moment Formation in Quantum Point Contacts
- Kenji
Hirose,1 Yigal Meir,2,3 and Ned S. Wingreen2
- 1Fundamental Research Laboratories, NEC Corporation,
34 Miyukigaoka, Tsukuba, Ibaraki 305-8501, Japan
2NEC Research Institute, 4 Independence Way, Princeton, New
Jersey 08540
3Physics Department, Princeton University, Princeton, New
Jersey 08540
-
(Received
30 July 2002; published 17 January 2003)
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. ©2003
The American Physical Society
URL: http://link.aps.org/abstract/PRL/v90/e026804
doi:10.1103/PhysRevLett.90.026804
PACS: 73.61.-r, 71.15.Mb, 71.70.Ej
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