These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: A series of two-dimensional carbon allotropes with Dirac cone structure.
    Author: Wang GX.
    Journal: Phys Chem Chem Phys; 2023 Jun 15; 25(23):15815-15821. PubMed ID: 37254773.
    Abstract:
    By combining a hexagon and square carbon ring, a series of two-dimensional (2D) carbon allotropes, named (HS)nm-graphene, can be obtained. Based on the first-principles calculations, the energetic, dynamical and mechanical stability were evaluated. Importantly, we predicted that some carbon allotropes possess the Dirac cone structure. A pair of Dirac points can be found for (HS)52-graphene and (HS)72-graphene in the first Brillouin zone. With varying the number of four- and six-membered rings, a distorted Dirac cone can be observed for (HS)41-graphene and (HS)71-graphene. To get insight into the features of the Dirac cone, the orbital decomposed band structure, the corresponding density of states, the projection map of the three-dimensional bands and Fermi velocity were investigated. Interestingly, the Fermi velocity of (HS)52-graphene is up to 8.8 × 105 m s-1 along the kx direction, which is higher than that of graphene, indicating higher potential application in electronic transport. Finally, we discuss the mechanical properties of (HS)nm-graphene. Our work provides a new way to design the stable 2D carbon allotropes with a Dirac cone.
    [Abstract] [Full Text] [Related] [New Search]