Realization of charge-four Weyl point in fermionic systems

Xiao，Xiaoliang1; Jin，Yuanjun2; Ma，Da Shuai1,3; Kong，Weixiang1; Fan，Jing4; Wang，Rui1,3,5; Wu，Xiaozhi1,5

2023-08-15

10.1103/PhysRevB.108.075130

Physical Review B   Impact Factor & Quartile

2469-9950

2469-9969

Unconventional quasiparticles of a twofold band degeneracy with |C|=4, named as charge-four Weyl point (CFWP), have been revealed in bosonic and artificial systems, while it is challenging in fermionic systems because of nonnegligible spin-orbit coupling. Herein, we propose a carbon allotrope, termed cP-C24, as an ideal platform to realize CFWP in the nonrelativistic limit. Besides one CFWP (C=+4), there are also eight type-I Weyl points (C=+1) and twelve type-II Weyl nodes (C=-1), making the topological charge in the whole Brillouin zone to be neutral. The characteristic quadruple helicoid surface states of CFWP are presented. Our work offering the avenue of CFWP in fermionic systems would absolutely advance the research on the chirality-dependent physical properties associated with unconventional topological quasiparticles.

SCI

English

NI Journal Papers

Others

National Natural Science Foundation of China (NSFC)["12174040","12204074","12222402","11974062","12147102"] ; China National Postdoctoral Program for Innovative Talent[BX20220367] ; Chongqing Natural Science Foundation[cstc2020jcyj-msxmX0118]

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:001068528100001

AMER PHYSICAL SOC

PHYSICS

2-s2.0-85169293207

Scopus

1.Institute for Structure and Function,Department of Physics,Chongqing University,Chongqing,400044,China
2.Division of Physics and Applied Physics,School of Physical and Mathematical Sciences,Nanyang Technological University,Singapore,637371,Singapore
3.Center of Quantum Materials and Devices,Chongqing University,Chongqing,400044,China
4.Center for Computational Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
5.Chongqing Key Laboratory for Strongly Coupled Physics,Chongqing,401331,China

Xiao，Xiaoliang,Jin，Yuanjun,Ma，Da Shuai,et al. Realization of charge-four Weyl point in fermionic systems[J]. Physical Review B,2023,108(7).

Xiao，Xiaoliang.,Jin，Yuanjun.,Ma，Da Shuai.,Kong，Weixiang.,Fan，Jing.,...&Wu，Xiaozhi.(2023).Realization of charge-four Weyl point in fermionic systems.Physical Review B,108(7).

Xiao，Xiaoliang,et al."Realization of charge-four Weyl point in fermionic systems".Physical Review B 108.7(2023).