Abstract
We have addressed the dynamical conductivity of AA-stacked bilayer graphene as a function of photon frequency in the presence of a finite bias voltage at finite temperature. Using linear response theory and Green’s function approach, the frequency dependence of optical conductivity has been obtained in the context of tight binding model Hamiltonian. Our results show a finite Drude absorption at low frequency for the case of charge neutrality. However, Drude weight gets remarkable amount at unbiased case. We have studied the behavior of optical spectra as a function of chemical potential for different values of bias voltages. Dynamical conductivity is found to be monotonically decreasing with chemical potential due to increased scattering among electrons at higher chemical potential. Furthermore the dependence of optical conductivity on the voltage bias and temperature has been investigated in details.
Similar content being viewed by others
References
K S Novoselov,etal Science 306 666 (2004)
K S Novoselov, etal Proc. Natl. Acad. Sci. USA 102 10541 (2005)
Y Zhang, Y -W Tan, H L Stormer, and P Kim Nature 438 201 (2005)
I Crassee, etal Nat. Phys. 7 48 (2011)
A H Castro Neto, F Guinea, N M R Peres, K S Novoselov and A K Geim Rev. Mod. Phys. 81 109 (2009)
J K Lee, S C Lee, J P Ahn, S C Kim, J B Wilson and P John J. Chem. Phys. 129 234709 (2008)
Ed McCann and V I Falko Phys. Rev. Lett. 96 086805 (2006)
A K Geim and K S Novoselov Nat. Mater. 6 183 (2007)
E McCann Phys. Rev. B 74 161403 (2006)
J B Oostinga, H B Heersche, X Liu, A F Morpurgo and L M K Vandersypen Nat. Mater. 10.1,38 nmat 2082 (2007)
E V Castro, etal Phys. Rev. Lett 99 216802 (2007)
H Min, B Sahu, S K Banerjee and A H MacDonald Phys. Rev. B 75 155115(2007)
J J Milton Pereira, P Vasilopoulos and F M Peeters Nano Lett. 7 946 (2007)
J Nilsson, A H Castro Neto, F Guinea and N M R Peres Phys. Rev. B 76 165416 (2007)
T Ando, Y Zhang and H Suzuura J. Phys. Soc. Jpn. 71 1318 (2002)
R R Nair, etal Science 320 1308 (2008)
D S L Abergal and V I Falko Phys. Rev. B 77 155409 (2008)
L M Zhang, Z Q Li, D N Basov, M M Fogler, Z Hao and M C Martin Phys. Rev. B 78 235408 (2008)
Y Xu, X Li and J Dong Nanotechnology 21 065711 (2010)
M L Sadowski, G Martinez, M Potemski, C Berger and W Ade Heer Phys. Rev. Lett. 97 266405(2006)
Z Q Li, etal Phys. Rev. B 74 195404 (2006)
Z Jiang, etal Phys. Rev. Lett 98 197403 (2007)
L A Falkovaky and A A Varlamov Eur. Phys. J. B 56 281 (2007)
V P Gusynin, S G Sharapov and J P Carbotte J. Phys. Condens. Matter. 19 026222 (2007)
V P Gusynin, S G Sharapov and J P Carbotte Phys. Rev. B 75 165407 (2007)
C J Tabert and E J Nicol Phys. Rev. B 86 075439 (2012)
E J Nicol and J P Carbotte Phys. Rev. B 77 155409 (2008)
I Lobato and B Partoens Phys. Rev. B 83 165429 (2011)
G D Mahan Many Particle Physics (NewYork: Plenumn Press) (ed.) M Zagoskin 115 (1993)
A L Fetter and J D Walecka Quantum Theory of Many Particle Systems (NewYork:MacGraw-Hill) (ed.) F K Richtmeyer 104 (1971)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Rezania, H., Yarmohammadi, M. Optical conductivity of AA-stacked bilayer graphene in presence of bias voltage beyond Dirac approximation. Indian J Phys 90, 811–817 (2016). https://doi.org/10.1007/s12648-015-0821-6
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12648-015-0821-6