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Magneto-thermodynamic properties of gapped graphene-like structures

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Abstract

By applying the Green’s function technique and using the tight-binding Hamiltonian model, thermodynamic properties of gapped graphene-like structures, including silicon carbide (SiC), boron nitride (BN) and beryllium monooxide (BeO) in the presence of a transverse magnetic field are investigated. In fact, we have studied electronic density of states (DOS), electronic heat capacity (EHC) and magnetic susceptibility (MS) in order to investigate the dynamics of Dirac fermions. At an applied certain value of magnetic field, the band gap width increases for SiC, BN and BeO structures with respect to the gapless graphene and a double peak appears in DOS with increasing of quantum states. On the other hand, the band gap size decreases with magnetic field. We have found that EHC and MS increase slightly at low temperatures with gap and magnetic field. Also, EHC and MS reach to their maximum value at a critical temperature point while an increase behavior has been observed for high temperatures significantly.

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Authors and Affiliations

  1. Department of Energy Engineering and Physics, Amirkabir University of Technology, Tehran, Iran

    Mohsen Yarmohammadi

  2. Research Institute for Applied Physics and Astronomy, University of Tabriz, Tabriz, Iran

    Maryam Beig-Mohammadi

  3. Department of Physics, Razi University, Kermanshah, Iran

    Bahram Shirzadi

Authors
  1. Mohsen Yarmohammadi
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  2. Maryam Beig-Mohammadi
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  3. Bahram Shirzadi
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Correspondence to Mohsen Yarmohammadi.

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Yarmohammadi, M., Beig-Mohammadi, M. & Shirzadi, B. Magneto-thermodynamic properties of gapped graphene-like structures. Indian J Phys 91, 659–664 (2017). https://doi.org/10.1007/s12648-017-0962-x

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  • DOI: https://doi.org/10.1007/s12648-017-0962-x

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