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Observation of van Hove Singularities in Twisted Silicene Multilayers

Journal Article


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Abstract


  • Interlayer interactions perturb the electronic structure of twodimensional

    materials and lead to new physical phenomena, such as van Hove

    singularities and Hofstadter’s butterfly pattern. Silicene, the recently

    discovered two-dimensional form of silicon, is quite unique, in that silicon

    atoms adopt competing sp2 and sp3 hybridization states leading to a lowbuckled

    structure promising relatively strong interlayer interaction. In

    multilayer silicene, the stacking order provides an important yet rarely

    explored degree of freedom for tuning its electronic structures through

    manipulating interlayer coupling. Here, we report the emergence of van Hove

    singularities in the multilayer silicene created by an interlayer rotation. We

    demonstrate that even a large-angle rotation (>20°) between stacked silicene

    layers can generate a Moiré pattern and van Hove singularities due to the

    strong interlayer coupling in multilayer silicene. Our study suggests an

    intriguing method for expanding the tunability of the electronic structure for

    electronic applications in this two-dimensional material.

Authors


  •   Li, Zhi
  •   Zhuang, Jincheng (external author)
  •   Chen, Lan (external author)
  •   Ni, Zhenyi (external author)
  •   Liu, Chen (external author)
  •   Wang, Li (external author)
  •   Xu, Xun
  •   Wang, Jiaou (external author)
  •   Pi, Xiaodong (external author)
  •   Wang, Xiaolin
  •   Du, Yi
  •   Wu, Kehui (external author)
  •   Dou, Shi Xue

Publication Date


  • 2016

Citation


  • Li, Z., Zhuang, J., Chen, L., Ni, Z., Liu, C., Wang, L., Xu, X., Wang, J., Pi, X., Wang, X., Du, Y., Wu, K. & Dou, S. Xue. (2016). Observation of van Hove Singularities in Twisted Silicene Multilayers. ACS Central science, 2 (8), 517-521.

Scopus Eid


  • 2-s2.0-85016494678

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3572&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2548

Has Global Citation Frequency


Number Of Pages


  • 4

Start Page


  • 517

End Page


  • 521

Volume


  • 2

Issue


  • 8

Place Of Publication


  • United States

Abstract


  • Interlayer interactions perturb the electronic structure of twodimensional

    materials and lead to new physical phenomena, such as van Hove

    singularities and Hofstadter’s butterfly pattern. Silicene, the recently

    discovered two-dimensional form of silicon, is quite unique, in that silicon

    atoms adopt competing sp2 and sp3 hybridization states leading to a lowbuckled

    structure promising relatively strong interlayer interaction. In

    multilayer silicene, the stacking order provides an important yet rarely

    explored degree of freedom for tuning its electronic structures through

    manipulating interlayer coupling. Here, we report the emergence of van Hove

    singularities in the multilayer silicene created by an interlayer rotation. We

    demonstrate that even a large-angle rotation (>20°) between stacked silicene

    layers can generate a Moiré pattern and van Hove singularities due to the

    strong interlayer coupling in multilayer silicene. Our study suggests an

    intriguing method for expanding the tunability of the electronic structure for

    electronic applications in this two-dimensional material.

Authors


  •   Li, Zhi
  •   Zhuang, Jincheng (external author)
  •   Chen, Lan (external author)
  •   Ni, Zhenyi (external author)
  •   Liu, Chen (external author)
  •   Wang, Li (external author)
  •   Xu, Xun
  •   Wang, Jiaou (external author)
  •   Pi, Xiaodong (external author)
  •   Wang, Xiaolin
  •   Du, Yi
  •   Wu, Kehui (external author)
  •   Dou, Shi Xue

Publication Date


  • 2016

Citation


  • Li, Z., Zhuang, J., Chen, L., Ni, Z., Liu, C., Wang, L., Xu, X., Wang, J., Pi, X., Wang, X., Du, Y., Wu, K. & Dou, S. Xue. (2016). Observation of van Hove Singularities in Twisted Silicene Multilayers. ACS Central science, 2 (8), 517-521.

Scopus Eid


  • 2-s2.0-85016494678

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3572&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2548

Has Global Citation Frequency


Number Of Pages


  • 4

Start Page


  • 517

End Page


  • 521

Volume


  • 2

Issue


  • 8

Place Of Publication


  • United States