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Current–current correlation function in 3D massive Dirac theory with chemical potential

E. Apresyan

Yerevan Physics Institute, Alikhanian Br. str. 2, Yerevan 36, Armenia

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Sh. Khachatryan

Yerevan Physics Institute, Alikhanian Br. str. 2, Yerevan 36, Armenia

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, and

A. Sedrakyan

Yerevan Physics Institute, Alikhanian Br. str. 2, Yerevan 36, Armenia

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https://doi.org/10.1142/S0217732315500352Cited by:2 (Source: Crossref)

Abstract

The response of fermionic system to external gauge fields is defined by current–current correlation function Π_μν(q, q₀). Transport properties of different physical quantities are determined by zero energy–momentum limit of it. As it is known close to half-filling the physics of graphene is described by (2+1)-dimensional Dirac theory. In this paper, we calculate current–current correlation function in Dirac theory in a presence of chemical potential η and gap m.

Keywords:

PACS: 03.70.+k, 11.40.Dw

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