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Raad Chegel

Raad Chegel

Academic rank: Associate Professor
ORCID:
Education: PhD.
ScopusId:
HIndex: 0/00
Faculty: science
Address: Malayer University
Phone: 09188899031

Research

Title
Bias induced modulation of electrical and thermal conductivity and heat capacity of BN and BN/graphene bilayers
Type
JournalPaper
Keywords
BN/graphene bilayers; Tight binding; Electronic structure; Electrical conductivity; Heat capacity; Thermal conductivity
Year
2017
Journal PHYSICA B-CONDENSED MATTER
DOI
Researchers Raad Chegel

Abstract

By using the tight binding approximation and Green function method, the electronic structure, density of state, electrical conductivity, heat capacity of BN and BN/graphene bilayers are investigated. The AA-, AB1- and AB2- BN/graphene bilayers have small gap unlike to BN bilayers which are wide band gap semiconductors. Unlike to BN bilayer, the energy gap of graphene/BN bilayers increases with external field. The magnitude of the change in the band gap of BN bilayers is much higher than the graphene/BN bilayers. Near absolute zero, the σ(T) is zero for BN bilayers and it increases with temperature until reaches maximum value then decreases. The BN/graphene bilayers have larger electrical conductivity larger than BN bilayers. For both bilayers, the specific heat capacity has a Schottky anomaly.