Giant diamagnetism in graphenes

Mikito Koshino, Yasunori Arimura, Tsuneya Ando

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

We study the orbital magnetism of graphene monolayer and multilayers within the effective mass approximation. For any layer numbers, the Hamiltonian and thus magnetic susceptibility can be decomposed into contributions from subsystems equivalent to monolayer or bilayer graphene. The monolayer-type subband exists only in odd-layer graphenes giving a singular susceptibility expressed by a delta function in the Fermi energy εF, while the bilayer-type subband exhibits a less singular, logarithmic peak in εF. We also study the orbital diamagnetism in non-uniform magnetic fields for monolayer graphene. We calculate within linear response theory an electric current induced by an external magnetic field with general wave number, to estimate the repulsive force between graphene and an arbitrary magnetic object located above. The magnitude of the force is much greater than that of conventional two-dimensional system, while it disappears with the increase of κF.

Original languageEnglish
Title of host publicationInternational Conference of Computational Methods in Sciences and Engineering 2009, ICCMSE 2009
Pages291-301
Number of pages11
DOIs
Publication statusPublished - 2012 Dec 1
EventInternational Conference of Computational Methods in Sciences and Engineering 2009, ICCMSE 2009 - Rhodes, Greece
Duration: 2009 Sep 292009 Oct 4

Publication series

NameAIP Conference Proceedings
Volume1504
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherInternational Conference of Computational Methods in Sciences and Engineering 2009, ICCMSE 2009
CountryGreece
CityRhodes
Period09/9/2909/10/4

Keywords

  • Graphene
  • diamagnetism

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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