Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 조준형 | - |
dc.date.accessioned | 2022-08-01T04:36:16Z | - |
dc.date.available | 2022-08-01T04:36:16Z | - |
dc.date.issued | 2020-10 | - |
dc.identifier.citation | PHYSICAL REVIEW B, v. 102, no. 15, article no. 155103 | en_US |
dc.identifier.issn | 2469-9950 | - |
dc.identifier.issn | 2469-9969 | - |
dc.identifier.uri | https://journals.aps.org/prb/abstract/10.1103/PhysRevB.102.155103 | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/171975 | - |
dc.description.abstract | 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. | en_US |
dc.description.sponsorship | This work was supported by in part by the National Natural Science Foundation of China (Grants No. 11974324, No. U1832151, and No. 11804326), the Strategic Priority Research Program of Chinese Academy of Sciences (CAS) (Grant No. XDC07010000), the National Key Research and Development Program of China (Grants No. 2017YFA0403600 and No. 2017YFA0402901), the Anhui Initiative in Quantum Information Technologies (Grant No. AHY170000), the Hefei Science Center CAS (Grant No. 2018HSC-UE014), and the National Research Foundation of Korea (NRF) Grant funded by the Korean Government (Grants No. 2019R1A2C1002975, No. 2016K1A4A3914691, and No. 2015M3D1A1070609). The calculations were performed by the KISTI Supercomputing Center through the Strategic Support Program (Program No. KSC-2018-CRE-0063) for the supercomputing application research. | en_US |
dc.language.iso | en | en_US |
dc.publisher | AMER PHYSICAL SOC | en_US |
dc.title | Dirac fermions in antiferromagnetic FeSn kagome lattices with combined space inversion and time-reversal symmetry | en_US |
dc.type | Article | en_US |
dc.relation.no | 15 | - |
dc.relation.volume | 102 | - |
dc.identifier.doi | 10.1103/PhysRevB.102.155103 | - |
dc.relation.page | 155103-155103 | - |
dc.relation.journal | PHYSICAL REVIEW B | - |
dc.contributor.googleauthor | Lin, Zhiyong | - |
dc.contributor.googleauthor | Wang, Chongze | - |
dc.contributor.googleauthor | Wang, Pengdong | - |
dc.contributor.googleauthor | Yi, Seho | - |
dc.contributor.googleauthor | Li, Lin | - |
dc.contributor.googleauthor | Zhang, Qiang | - |
dc.contributor.googleauthor | Wang, Yifan | - |
dc.contributor.googleauthor | Wang, Zhongyi | - |
dc.contributor.googleauthor | Huang, Hao | - |
dc.contributor.googleauthor | Cho, Jun-Hyung | - |
dc.relation.code | 2020052321 | - |
dc.sector.campus | S | - |
dc.sector.daehak | COLLEGE OF NATURAL SCIENCES[S] | - |
dc.sector.department | DEPARTMENT OF PHYSICS | - |
dc.identifier.pid | chojh | - |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.