Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 9, Issue 7, Pages 1815-+Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.8b00616
Keywords
-
Categories
Funding
- National Key Research and Development Program of China [2016YFE0127300, 2017YFA0205003]
- National Natural Science Foundation of China [NSFC-51471004, NSFC-21773004]
- National Training Program of Innovation for Undergraduates of China
- High Performance Computing Platform of Peking University, China
Ask authors/readers for more resources
Different from the isotropic Dirac cones existing in other two-dimensional (2D) materials, anisotropic Dirac cones have the merit of anisotropic carrier mobility for applications in direction-dependent quantum devices. Motivated by the recent experimental finding of an anisotropic Dirac cone in borophene, here we report a new 2D anisotropic Dirac cone material, B2S monolayer, identified by using a global structure search method and first-principles calculation combined with a tight-binding model. The B2S monolayer is found to be stable mechanically, thermally, and dynamically and exhibits an anisotropic Dirac cone exactly at the Fermi level, showing a Fermi velocity of 10(6) m/s in the same order of magnitude as that of graphene. Moreover, B2S monolayer is the first anisotropy Dirac cone material with a pristine honeycomb structure stabilized by S in free-standing conditions where each atom has four valence electrons on average being isoelectronic to C. This study would expand the Dirac cone material family with new features.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available