Dirac fermions in antiferromagnetic FeSn kagome lattices with combined space inversion and time-reversal symmetry

doi:10.1103/PhysRevB.102.155103

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Dirac fermions in antiferromagnetic FeSn kagome lattices with combined space inversion and time-reversal symmetry
	Lin, ZY ; Wang, CZ ; Wang, PD ; Yi, S ; Li, L ; Zhang, Q ; Wang, YF ; Wang, ZY ; Huang, H ; Sun, Y
刊名	PHYSICAL REVIEW B
	2020
卷号	102 期号:15 页码:-
关键词	GROUND-STATES HUBBARD-MODEL SEMIMETAL
ISSN号	2469-9950
DOI	10.1103/PhysRevB.102.155103
文献子类	期刊论文
英文摘要	Symmetry principles play a critical role in formulating the fundamental laws of nature, with a large number of symmetry-protected topological states identified in recent studies of quantum materials. As compelling examples, massless Dirac fermions are jointly protected by the space inversion symmetry P and time-reversal symmetry T supplemented by additional crystalline symmetry, while evolving into Weyl fermions when either P or T is broken. Here, based on first-principles calculations, we reveal that massless Dirac fermions are present in a layered FeSn crystal containing antiferromagnetically coupled ferromagnetic Fe kagome layers, where each of the P and T symmetries is individually broken but the combined PT symmetry is preserved. These stable Dirac fermions, protected by the combined PT symmetry with additional nonsymmorphic S-2z symmetry, can be transformed to either massless/massive Weyl or massive Dirac fermions by breaking the PT or S-2z symmetry. Our angle-resolved photoemission spectroscopy experiments indeed observed the Dirac states in the bulk and two-dimensional Weyl-like states at the surface. The present paper substantially enriches our fundamental understanding of the intricate connections between symmetries and topologies of matter, especially with the spin degree of freedom playing a vital role.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/32790]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Max Planck Inst Chem Phys Solid, D-01187 Dresden, Germany 2.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China 3.Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, Ctr Excellence Superconducting Elect, Shanghai 200050, Peoples R China 4.Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R China 5.Fudan Univ, Dept Phys, State Key Lab Surface Phys, Shanghai 200438, Peoples R China (1 6.Fudan Univ, Adv Mat Lab, Shanghai 200438, Peoples R China 7.Univ Sci & Technol China, Dept Phys, CAS Key Lab Strongly Coupled Quantum Matter Phys, Int Ctr Quantum Design Funct Mat,Hefei Natl Lab P, Hefei 230026, Anhui, Peoples R China 8.Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Hefei 230026, Anhui, Peoples R China 9.Hanyang Univ, Res Inst Nat Sci, Dept Phys, 222 Wangsimni Ro, Seoul 04763, South Korea 10.Hanyang Univ, HYU HPSTAR CIS High Pressure Res Ctr, 222 Wangsimni Ro, Seoul 04763, South Korea
推荐引用方式 GB/T 7714	Lin, ZY,Wang, CZ,Wang, PD,et al. Dirac fermions in antiferromagnetic FeSn kagome lattices with combined space inversion and time-reversal symmetry[J]. PHYSICAL REVIEW B,2020,102(15):-.
APA	Lin, ZY.,Wang, CZ.,Wang, PD.,Yi, S.,Li, L.,...&Zhang, ZY.(2020).Dirac fermions in antiferromagnetic FeSn kagome lattices with combined space inversion and time-reversal symmetry.PHYSICAL REVIEW B,102(15),-.
MLA	Lin, ZY,et al."Dirac fermions in antiferromagnetic FeSn kagome lattices with combined space inversion and time-reversal symmetry".PHYSICAL REVIEW B 102.15(2020):-.