Magnetic Excitations of Graphene in 8-Spinor Realization of Chiral Model

Abstract


The simplest scalar chiral model of graphene suggested earlier and based on the SU(2) order parameter is generalized by including 8-spinor field as an additional order parameter for the description of spin (magnetic) excitations in graphene. As an illustration we study the interaction of the graphene layer with the external magnetic field. In the case of the magnetic field parallel to the graphene plane the diamagnetic effect is predicted, that is the weakening of the magnetic intensity in the volume of the material. However, for the case of the magnetic field orthogonal to the graphene plane the strengthening of the magnetic intensity is revealed in the central domain (at small r). Thus, the magnetic properties of the graphene prove to be strongly anisotropic.


Yu P Rybakov

soliton4@mail.ru
<p>Peoples&rsquo; Friendship University of Russia (RUDN University)</p>

6 Miklukho-Maklaya St., Moscow, 117198, Russian Federation

Department of Theoretical Physics and Mechanics

M Iskandar

iskaandanr@gmail.com
<p>Peoples&rsquo; Friendship University of Russia (RUDN University)</p>

6 Miklukho-Maklaya St., Moscow, 117198, Russian Federation

Department of Theoretical Physics and Mechanics

A B Ahmed

garkuwaz@yahoo.com
<p>Peoples&rsquo; Friendship University of Russia (RUDN University)</p>

6 Miklukho-Maklaya St., Moscow, 117198, Russian Federation

Department of Theoretical Physics and Mechanics

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Copyright (c) 2017 Rybakov Y.P., Iskandar M., Ahmed A.B.

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