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

Journal Article · · Physical Review B
 [1];  [2]
  1. Univ. of Utah, Salt Lake City, UT (United States); DOE/OSTI
  2. 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, Journal Name: Physical Review B Journal Issue: 7 Vol. 95; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Kondo effect due to a hydrogen impurity in graphene: A multichannel Kondo problem with diverging hybridization text January 2019
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RKKY Interaction in Graphene at Finite Temperature journal March 2019
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