• Microscopic theory of substrate-induced gap effect on real AFM susceptibility in graphene

    • Fulltext


        Click here to view fulltext PDF

      Permanent link:

    • Keywords


      Graphene; dynamic spin antiferromagnetic susceptibility; Coulomb interaction

    • Abstract


      We address here a tight-binding model study of frequency-dependent real part of antiferromagnetic susceptibility for the graphene systems. TheHamiltonian consists of electron hopping upto third nearest-neighbours,substrate and impurity effects in the presence of electron–electron interactions at A and B sublattices. To calculate susceptibility, we evaluate the two-particle electron Green’s function by using Zubarev’s Green’s functiontechnique. The frequency-dependent real part of antiferromagnetic susceptibility of the system is computed numerically by taking 1000 × 1000 grid points of the electron momentum. The susceptibility displays a sharp peak at the neutron momentum transfer energy at low energies and another higher energy peak appearing at substrate-induced gap. The evolution of these two peaks is investigated by varying neutron wave vector, Coulomb correlation energy, substrate-induced gap, electron hopping integrals and A- and B-site electron doping concentrations.

    • Author Affiliations



      1. School of Applied Sciences (Physics), Campus-3, KIIT University, Bhubaneswar 751 024, India
      2. K.D. Science College, Pochilima, Hinjilicut 761 101, India
      3. Condensed Matter Physics Group, Physics Enclave, Plot No. 664/4825, Lane-4A, Shree Vihar, Chandrasekharpur, Po-Patia, Bhubaneswar 751 031, India
    • Dates

  • Pramana – Journal of Physics | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2017-2019 Indian Academy of Sciences, Bengaluru.