In:
Chinese Physics B, IOP Publishing, Vol. 31, No. 3 ( 2022-03-01), p. 037305-
Abstract:
The two-dimensional (2D) materials with nodal line band crossing have been attracting great research interest. However, it remains a challenge to find high-stable nodal line structure in 2D systems. Herein, based on the first-principles calculations and theoretical analysis, we propose that monolayer B 6 O possesses symmetry protected Dirac nodal line (DNL) state, with its Fermi velocity of 10 6 m/s in the same order of magnitude as that of graphene. The origin of DNL fermions is induced by coexistence of time-reversal symmetry and inversion symmetry. A two-band tight-binding model is further given to understand the mechanism of DNL. Considering its robustness against spin–orbit coupling (SOC) and high structural stability, these results suggest monolayer B 6 O as a new platform for realizing future high-speed low-dissipation devices.
Type of Medium:
Online Resource
ISSN:
1674-1056
DOI:
10.1088/1674-1056/ac4cba
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2022
detail.hit.zdb_id:
2441677-0
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