Topological insulating phases in mono and bilayer graphene
Alberto Cortijo, Adolfo G. Grushin, Maria A. H. Vozmediano
TL;DR
This paper investigates how quadratic interactions induce time-reversal invariant topological insulating phases in mono and bilayer graphene, using effective action formalism to analyze the Chern-Simons coefficient.
Contribution
It introduces a method to analyze the impact of quadratic interactions on topological phases in graphene via effective action formalism.
Findings
Quadratic interactions can induce topological insulating phases in graphene.
The Chern-Simons coefficient depends on the specific interactions.
The formalism provides a way to predict topological phase transitions.
Abstract
We analyze the influence of different quadratic interactions giving rise to time reversal invariant topological insulating phases in mono and bilayer graphene. We make use of the effective action formalism to determine the dependence of the Chern Simons coefficient on the different interactions.
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