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Title: Long-range exchange interaction between magnetic impurities in graphene

Journal Article · · Physical Review B
 [1];  [1]
  1. Univ. of Utah, Salt Lake City, UT (United States)

The effective spin exchange RKKY coupling between impurities (adatoms) on graphene mediated by conduction electrons is studied as a function of the strength of the potential part of the on-site energy U of the electron-adatom interaction. With increasing U, the exchange coupling becomes long range, determined largely by the impurity levels with energies close to the Dirac points. Finally, when adatoms reside on opposite sublattices, their exchange coupling, normally antiferromagnetic, becomes ferromagnetic and resonantly enhanced at a specific distance where an impurity level crosses the Dirac point.

Research Organization:
Univ. of Utah, Salt Lake City, UT (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FG02-06ER46313
OSTI ID:
1535854
Alternate ID(s):
OSTI ID: 1343338
Journal Information:
Physical Review B, Vol. 95, Issue 7; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

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RKKY interaction in graphene text January 2011
Resonant finite-size impurities in graphene, unitary limit and Friedel oscillations text January 2012
Indirect Exchange and Ruderman-Kittel-Kasuya-Yosida (RKKY) Interactions in Magnetically-Doped Graphene text January 2013
Influence of the degree of decoupling of graphene on the properties of transition metal adatoms text January 2013
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Cited By (8)