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Volumn 34, Issue 10, 2008, Pages 1007-1011

Toward theory of quantum Hall effect in graphene

Author keywords

Dirac quasiparticle; Graphene; Quantum Hall effect

Indexed keywords

DYNAMICS; ELECTRIC CURRENTS; GALLIUM ALLOYS; GALVANOMAGNETIC EFFECTS; HALL EFFECT; MAGNETIC FIELD MEASUREMENT; MAGNETIC FIELDS; MAGNETIC MATERIALS; SOUND REPRODUCTION;

EID: 53449100338     PISSN: 01326414     EISSN: 18160328     Source Type: Journal    
DOI: None     Document Type: Article
Times cited : (5)

References (47)
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    • While there is the Debye screening at nonzero chemical potential μ0, the situation is more complicated near the Dirac point with μ0, 0, M.I. Katsnelson, Phys. Rev. B74, 201401(R, 2006);
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    • In that case, while for subcritical values of the coupling constant the polarization effects lead only to charge screening without changing the form of the Coulomb interactions at large distances, they lead to a drastic change of the form of the interactions for a supercritical coupling, A.V. Shytov, M.I. Katsnelson, and L.S. Levitov, Phys. Rev. Lett. 99, 236801 (2007, In the present work, the dynamics with a subcritical coupling is utilized, when no dynamical gaps are generated without a magnetic field, the latter was clearly shown in the experiments [2,3, In our approximation, using smeared contact interactions with an ultraviolet cutoff A, L(B, the contribution of large momenta k > L(B)/v F is suppressed much stronger than for the subcritical Coulomb like interactions. However, because the dominant contribution in the gap equation comes from momenta k << L(B)/vF, we expect that the present
    • F, we expect that the present approximation is qualitatively reliable even near the Dirac point.
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    • This relation can be easily obtained in the formalism of the effective action for composite operators developed in J.M. Luttinger and J.D. Ward, Phys. Rev. 118, 1417 (1960);
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    • In dynamics in a magnetic field at zero temperature, there is no one-to-one correspondence between electron density and chemical potential. As a result, different values of the latter may correspond to the same physics, as it takes place for this solution
    • In dynamics in a magnetic field at zero temperature, there is no one-to-one correspondence between electron density and chemical potential. As a result, different values of the latter may correspond to the same physics, as it takes place for this solution.
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    • This expression for Δ̃ is valid only for λ < 1: in a supercritical regime, with λ > 1, a dynamical Dirac mass (gap) is generated even with no magnetic field. Experiments [2,3] clearly show that the subcritical regime, with λ < 1, takes place in graphene
    • This expression for Δ̃ is valid only for λ < 1: in a supercritical regime, with λ > 1, a dynamical Dirac mass (gap) is generated even with no magnetic field. Experiments [2,3] clearly show that the subcritical regime, with λ < 1, takes place in graphene.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.