Advertisement

Twisted multilayer graphene exhibiting strong absorption bands induced by van Hove Singularities

  • Umesha Mogera
  • Giridhar U KulkarniEmail author
Article
  • 159 Downloads

Abstract

Twisted bilayer graphene exhibits several angle-dependent properties due to the emergence of the van Hove Singularities in its density of states. Among them, twist-angle-dependent optical absorption has gained a lot of attention due to its presence in the visible spectral region. However, observation of such absorption is experimentally tricky due to large transmittance. In this study, we use highly decoupled twisted multilayer graphene to observe such absorption in the visible region using a simple spectrometer. A large number of twisted graphene layers in the system enable observation of such absorption evident in the visible region; the absorption band position correlates with the twist angle measured using selective area electron diffraction pattern as well as predictions from theory. While the Raman spectra were akin to those of the decoupled graphene system, at specific twist angle of \({\sim }13^{\circ }\), the spectrum contained clear signatures of G-band enhancement.

Keywords

Graphene twisted bilayer graphene twisted multilayer graphene optical absorption G-band enhancement van Hove Singularities 

Notes

Acknowledgements

We thank Prof C N R Rao for his constant encouragement and support. This research work is supported by Department of Science and Technology (DST), New Delhi, India. UM acknowledges IGSTC project for the fellowship.

Supplementary material

12034_2018_1648_MOESM1_ESM.pdf (422 kb)
Supplementary material 1 (pdf 422 KB)

References

  1. 1.
    Yan W, Meng L, Liu M, Qiao J B, Chu Z D, Dou R F et al 2014 Phys. Rev. B 90 115402CrossRefGoogle Scholar
  2. 2.
    Landgraf W, Shallcross S, Türschmann K, Weckbecker D and Pankratov O 2013 Phys. Rev. B 87 075433CrossRefGoogle Scholar
  3. 3.
    Robinson J T, Schmucker S W, Diaconescu C B, Long J P, Culbertson J C, Ohta T et al 2013 ACS Nano 7 637CrossRefGoogle Scholar
  4. 4.
    Jorio A and Cançado L G 2013 Solid State Commun. 175 3CrossRefGoogle Scholar
  5. 5.
    Luican A, Li G, Reina A, Kong J, Nair R R, Novoselov K S et al 2011 Phys. Rev. Lett. 106 126802CrossRefGoogle Scholar
  6. 6.
    Ding Y, Peng Q, Gan L, Wu R, Ou X, Zhang Q et al 2016 Chem. Mater. 28 1034CrossRefGoogle Scholar
  7. 7.
    Xian L, Wang Z F and Chou M Y 2013 Nano Lett. 13 5159CrossRefGoogle Scholar
  8. 8.
    Wang Z F, Liu F and Chou M Y 2012 Nano Lett. 12 3833CrossRefGoogle Scholar
  9. 9.
    Li G, Luican A, Lopes dos Santos J M B, Castro Neto A H, Reina A, Kong J et al 2010 Nat. Phys. 6 109CrossRefGoogle Scholar
  10. 10.
    Liao L, Wang H, Peng H, Yin J, Koh A L, Chen Y et al 2015 Nano Lett. 15 5585CrossRefGoogle Scholar
  11. 11.
    Yin J B, Wang H, Peng H, Tan Z J, Liao L, Lin L et al 2016 Nat. Commun. 7 10699CrossRefGoogle Scholar
  12. 12.
    Havener R W, Zhuang H, Brown L, Hennig R G and Park J 2012 Nano Lett. 12 3162CrossRefGoogle Scholar
  13. 13.
    Ni Z, Liu L, Wang Y, Zheng Z, Li L J, Yu T et al 2009 Phys. Rev. B 80 125404CrossRefGoogle Scholar
  14. 14.
    Carozo V, Almeida C M, Fragneaud B, Bedê P M, Moutinho M V O, Ribeiro-Soares J et al 2013 Phys. Rev. B 88 085401CrossRefGoogle Scholar
  15. 15.
    Havener R W, Liang Y, Brown L, Yang L and Park J 2014 Nano Lett. 14 3353CrossRefGoogle Scholar
  16. 16.
    Mogera U, Dhanya R, Pujar R, Narayana C and Kulkarni G U 2015 J. Phys. Chem. Lett. 6 4437CrossRefGoogle Scholar
  17. 17.
    Mogera U, Kurra N, Radhakrishnan D, Narayana C and Kulkarni G U 2014 Carbon 78 384CrossRefGoogle Scholar
  18. 18.
    Mogera U, Walia S, Bannur B, Gedda M and Kulkarni G U 2017 J. Phys. Chem. C 121 13938CrossRefGoogle Scholar
  19. 19.
    Bae S, Kim H, Lee Y, Xu X, Park J S, Zheng Y et al 2010 Nat. Nanotechnol. 5 574CrossRefGoogle Scholar
  20. 20.
    Hobeom K, Sang-Hoon B, Tae-Hee H, Kyung-Geun L, Jong-Hyun A and Tae-Woo L 2014 Nanotechnology 25 014012CrossRefGoogle Scholar

Copyright information

© Indian Academy of Sciences 2018

Authors and Affiliations

  1. 1.Centre for Nano and Soft Matter SciencesBangaloreIndia
  2. 2.On lien from Jawaharlal Nehru Centre for Advanced Scientific ResearchBangaloreIndia

Personalised recommendations