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        Additional Information


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References

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