Fizika Nizkikh Temperatur: Volume 46, Number 7 (July 2020), p. 812-817    ( to contents , go back )

Effective low-energy spin model for narrow zigzag graphene nanoribbons

V.O. Cheranovskii1, V.V. Slavin2, and E.V. Ezerskaya1

1V.N. Karazin Kharkiv National University, 4 Svoboda Sq., Kharkiv 61022, Ukraine
E-mail: cheranovskii@i.ua

2B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Nauky Ave., Kharkiv 61103, Ukraine

Received March 11, 2020, published online May 26, 2020

Abstract

The magnetic properties of narrow zigzag graphene nanoribbons with periodically embedded atoms of transition metals have been studied in the framework of Heisenberg spin Hamiltonian. We have proposed the simple effective model to give a semi-qualitative description of the peculiarities of magnetization profiles of the systems under consideration. This model can be used for an arbitrary value of spin of the embedded atoms of transition metals. Our analytical and numerical calculations confirm the correctness of the proposed model.

Key words: graphene nanoribbons, Lieb theorem, Heisenberg spin model.

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