Strain Effect on Transmission in Graphene Laser Barrier
- URL: http://arxiv.org/abs/2111.14137v1
- Date: Sun, 28 Nov 2021 13:31:17 GMT
- Title: Strain Effect on Transmission in Graphene Laser Barrier
- Authors: Hasna Chnafa, Miloud Mekkaoui, Ahmed Jellal, Abdelhadi Bahaoui
- Abstract summary: We investigate the strain effect along armchair zigzag and directions on the tunneling transport of Dirac fermions in graphene laser barrier.
It is found that the number of oscillations in all transmission channels reduces with increasing the strength of armchair strain.
It is observed the appearance of Fano type resonance peaks by altering the amplitude and the frequency of the laser field.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We investigate the strain effect along armchair and zigzag directions on the
tunneling transport of Dirac fermions in graphene laser barrier through a time
dependent potential along y-axis. Our system is composed of three regions and
the central one is subjected to a deformation of strength S. Based on Dirac
equation and the Floquet approach, we determine the eigenvalues and
eigenspinors for each region. Using the boundary conditions at interfaces
together with the transfer matrix method we identify the transmission in the
different Floquet sideband states as function of the physical parameters. In
the strainless case, we show that the transmisson of central band decreases for
smaller values of the barrier width and rapidly oscillates with different
amplitude for larger ones. Whereas the transmission for the first sidebands
increases from zero and shows a damped oscillatory profile. It is found that
the number of oscillations in all transmission channels reduces with increasing
the strength of armchair strain but becomes more important by switching the
deformation to zigzag. Moreover, it is observed the appearance of Fano type
resonance peaks by altering the amplitude and the frequency of the laser field.
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