Local Moment Formation in Quantum Point Contacts

Kenji Hirose; Yigal Meir; Ned S. Wingreen

doi:10.1103/PhysRevLett.90.026804

Local Moment Formation in Quantum Point Contacts

Kenji Hirose, Yigal Meir, Ned S. Wingreen

Department of Physics

Research output: Contribution to journal › Article › peer-review

118 Scopus citations

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.

Original language	English
Article number	026804
Number of pages	4
Journal	Physical Review Letters
Volume	90
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevLett.90.026804
State	Published - 17 Jan 2003

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.90.026804

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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.",

author = "Kenji Hirose and Yigal Meir and Wingreen, {Ned S.}",

note = "Funding Information: The work by Y. M. at Rutgers was partially supported by NSF Grant No. DMR 00-93079 and by DOE Grant No. DE-FG02-00ER45790, and K. H. acknowledges useful discussions with Shu-Shen Li. ",

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N2 - 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.

AB - 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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Local Moment Formation in Quantum Point Contacts

Abstract

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