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2014 | 126 | 1 | 236-237
Article title

Indirect Coupling Between Localized Magnetic Moments in Zero-Dimensional Graphene Nanostructures (Quantum Dots)

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EN
Abstracts
EN
The indirect Ruderman-Kittel-Kasuya-Yosida (RKKY) coupling between on-site magnetic impurities is studied for two kinds of graphene nanoflakes consisting of approximately 100 carbon atoms, posessing either zigzag or armchair edge. The tight-binding Hamiltonian with Hubbard term is used in non-perturbative calculations of coupling between the impurities, placed at the edge of the structure. In general, for zigzag-edged nanoflakes a pronounced coupling robust against charge doping is found, while for armchair-edged structures the interaction is weaker and much more sensitive to charge doping. Also the distance dependence of indirect exchange differs significantly for both edge forms.
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Contributors
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  • Department of Solid State Physics, Faculty of Physics and Applied Informatics, University of Łódź Pomorska 149/153, PL 90-236 Łódź, Poland
References
  • [1] L. Zhou, J. Wiebe, S. Lounis, E. Vedmedenko, F. Meier, S. Blügel, P.H. Dederichs, R. Wiesendanger, Nature Physics 6, 187 (2010), doi: 10.1038/nphys1514
  • [2] J. Fernández-Rossier, J.J. Palacios, Phys. Rev. Lett. 99, 177204 (2007), doi: 10.1103/PhysRevLett.99.177204
  • [3] M. Ezawa, Physica E 40, 1421 (2008), doi: 10.1016/j.physe.2007.09.031
  • [4] O.V. Yazyev, Rep. Prog. Phys. 73, 056501 (2010), doi: 10.1088/0034-4885/73/5/056501
  • [5] P. Potasz, A.D. Güçlü, P. Hawrylak, Phys. Rev. B 81, 033403 (2010), doi: 10.1103/PhysRevB.81.033403
  • [6] Y. Ominato, M. Koshino, Phys. Rev. B 87, 115433 (2013), doi: 10.1103/PhysRevB.87.115433
  • [7] X. Guo, C. Wang, Y. Zhou, Phys. Lett. A 377, 993 (2013), doi: 10.1016/j.physleta.2013.02.029
  • [8] J. Fernández-Rossier, L. Brey, Phys. Rev. Lett. 93, 117201 (2004), doi: 10.1103/PhysRevLett.93.117201
  • [9] K. Szałowski, Phys. Rev. B 84, 205409 (2011), doi: 10.1103/PhysRevB.84.205409
  • [10] K. Szałowski, Physica E 52, 46 (2013), doi: 10.1016/j.physe.2013.03.017
  • [11] K. Szałowski, J. Phys.: Condens. Matter 25, 166001 (2013), doi: 10.1088/0953-8984/25/16/166001
  • [12] A.M. Black-Schaffer, Phys. Rev. B 81, 205416 (2010), doi: 10.1103/PhysRevB.81.205416
  • [13] A.M. Black-Schaffer, Phys. Rev. B 82, 073409 (2010), doi: 10.1103/PhysRevB.82.073409
  • [14] S.R. Power, M.S. Ferreira, Crystals 3, 49 (2013), doi: 10.3390/cryst3010049
  • [15] M. Sherafati, S. Satpathy, Phys. Rev. B 83, 165425 (2011), doi: 10.1103/PhysRevB.83.165425
  • [16] H. Feldner, Z.Y. Meng, A. Honecker, D. Cabra, S. Wessel, F.F. Assaad, Phys. Rev. B 81, 115416 (2010), doi: 10.1103/PhysRevB.81.115416
Document Type
Publication order reference
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YADDA identifier
bwmeta1.element.bwnjournal-article-appv126n1113kz
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