Topological Crystalline Insulator Candidate ErAsS with Hourglass Fermion and Magnetic-Tuned Topological Phase Transition

Chen, Hongxiang1,2; Gao, Jiacheng1,3; Chen, Long1,3; Wang, Gang1,3,4; Li, Hang5; Wang, Yulong1,3; Liu, Juanjuan6,7; Wang, Jinchen6,7; Geng, Daiyu1,3; Zhang, Qinghua1; Sheng, Jieming8,9; Ye, Feng10; Qian, Tian1,3,4; Chen, Lan1,3,4; Weng, Hongming1,3,4; Ma, Jie11; Chen, Xiaolong1,3,4

2022-06-01

10.1002/adma.202110664

ADVANCED MATERIALS   影响因子和分区

0935-9648

1521-4095

Topological crystalline insulators (TCIs) with hourglass fermion surface state have attracted a lot of attention and are further enriched by crystalline symmetries and magnetic order. Here, the emergence of hourglass fermion surface state and exotic phases in the newly discovered, air-stable ErAsS single crystals are shown. In the paramagnetic phase, ErAsS is expected to be a TCI with hourglass fermion surface state protected by the nonsymmorphic symmetry. Dirac-cone-like bands and nearly linear dispersions in large energy range are experimentally observed, consistent well with theoretical calculations. Below T-N approximate to 3.27 K, ErAsS enters a collinear antiferromagnetic state, which is a trivial insulator breaking the time-reversal symmetry. An intermediate incommensurate magnetic state appears in a narrow temperature range (3.27-3.65 K), exhibiting an abrupt change in magnetic coupling. The results reveal that ErAsS is an experimentally available TCI candidate and provide a unique platform to understand the formation of hourglass fermion surface state and explore magnetic-tuned topological phase transitions.

distortion hourglass fermion surface state magnetic structures topological crystalline insulator

SCI ; EI

英语

NI论文

其他

National Natural Science Foundation of China[51832010,51902055,11925408,12104255,12188101,11921004] ; National Key Research and Development Program of China["2018YFE0202602","2018YFA0305700","2017YFA0302902"] ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences[QYZDJ-SSW-SLH013] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB33000000]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000815724800001

WILEY-V C H VERLAG GMBH

20222612273892

Magnetic couplings ; Magnetism ; Single crystals ; Surface states

Mechanical Drives and Transmissions:602 ; Magnetism: Basic Concepts and Phenomena:701.2 ; Combinatorial Mathematics, Includes Graph Theory, Set Theory:921.4 ; Classical Physics; Quantum Theory; Relativity:931 ; High Energy Physics; Nuclear Physics; Plasma Physics:932 ; Crystalline Solids:933.1

MATERIALS SCIENCE

Web of Science

1.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
2.Fujian Univ Technol, Sch Mat Sci & Engn, Fuzhou 350118, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China
5.Paul Scherrer Inst, Photon Sci Div, Forsch Str 111, CH-5232 Villigen, Switzerland
6.Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China
7.Renmin Univ China, Beijing Key Lab Optoelect Funct Mat & Micronano D, Beijing 100872, Peoples R China
8.Southern Univ Sci & Technol, Acad Adv Interdisciplinary Studies, Shenzhen 518055, Peoples R China
9.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
10.Oak Ridge Natl Lab, Neutron Scattering Div, POB 2009, Oak Ridge, TN 37831 USA
11.Shanghai Jiao Tong Univ, Sch Phys & Astron, Key Lab Artificial Struct & Quantum Control, Shenyang Natl Lab Mat Sci, Shanghai 200240, Peoples R China

Chen, Hongxiang,Gao, Jiacheng,Chen, Long,et al. Topological Crystalline Insulator Candidate ErAsS with Hourglass Fermion and Magnetic-Tuned Topological Phase Transition[J]. ADVANCED MATERIALS,2022,34.

Chen, Hongxiang.,Gao, Jiacheng.,Chen, Long.,Wang, Gang.,Li, Hang.,...&Chen, Xiaolong.(2022).Topological Crystalline Insulator Candidate ErAsS with Hourglass Fermion and Magnetic-Tuned Topological Phase Transition.ADVANCED MATERIALS,34.

Chen, Hongxiang,et al."Topological Crystalline Insulator Candidate ErAsS with Hourglass Fermion and Magnetic-Tuned Topological Phase Transition".ADVANCED MATERIALS 34(2022).