Dynamic RKKY interaction in graphene
File Type:
PDFItem Type:
Journal ArticleDate:
2012Access:
OpenAccessCitation:
S. R. Power, F. S. M. Guimaraes, A. T. Costa, R. B. Muniz, and M. S. Ferreira, Dynamic RKKY interaction in graphene, Physical Review B, 85, 2012, 195411-Download Item:
PhysRevB.85.195411.pdf (Published (publisher's copy)) 279.2Kb
Abstract:
The growing interest in carbon-based spintronics has stimulated a number of recent theoretical studies on the
Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction in graphene, based on which the energetically favorable
alignment between magnetic moments embedded in this material can be calculated. The general consensus is that
the strength of the RKKY interaction in undoped graphene decays as 1
/D
3
or faster, where
D
is the separation
between magnetic moments. Such an unusually fast decay for a two-dimensional system suggests that the RKKY
interaction may be too short ranged to be experimentally observed in graphene. Here we show in a mathematically
transparent form that a far more long ranged interaction arises when the magnetic moments are taken out of their
equilibrium positions and set in motion. We not only show that this dynamic version of the RKKY interaction in
graphene decays far more slowly but also propose how it can be observed with currently available experimental
methods.
Sponsor
Grant Number
Science Foundation Ireland (SFI)
SFI 11/RFP.1/MTR/3083
Author's Homepage:
http://people.tcd.ie/ferreirmhttp://people.tcd.ie/stpower
Description:
PUBLISHED
Author: Ferreira, Mauro; Power, Stephen
Type of material:
Journal ArticleCollections:
Series/Report no:
Physical Review B85
Availability:
Full text availableKeywords:
grapheneSubject (TCD):
Nanoscience & MaterialsDOI:
http://dx.doi.org/10.1103/PhysRevB.85.195411Licences: