Back to Search
Start Over
Experimental realization of two-dimensional Dirac nodal line fermions in monolayer Cu2Si
- Source :
- Nature communications 8 (2017): 1007. doi:10.1038/s41467-017-01108-z, info:cnr-pdr/source/autori:Feng, Baojie; Feng, Baojie; Fu, Botao; Kasamatsu, Shusuke; Ito, Suguru; Cheng, Peng; Liu, Cheng Cheng; Feng, Ya; Feng, Ya; Wu, Shilong; Mahatha, Sanjoy K.; Sheverdyaeva, Polina; Moras, Paolo; Arita, Masashi; Sugino, Osamu; Chiang, Tai Chang; Shimada, Kenya; Miyamoto, Koji; Okuda, Taichi; Wu, Kehui; Chen, Lan; Yao, Yugui; Matsuda, Iwao/titolo:Experimental realization of two-dimensional Dirac nodal line fermions in monolayer Cu2<%2Finf>Si/doi:10.1038%2Fs41467-017-01108-z/rivista:Nature communications/anno:2017/pagina_da:1007/pagina_a:/intervallo_pagine:1007/volume:8, Nature Communications, Nature Communications, Vol 8, Iss 1, Pp 1-6 (2017)
- Publication Year :
- 2017
- Publisher :
- Nature Publishing Group., London , Regno Unito, 2017.
-
Abstract
- Topological nodal line semimetals, a novel quantum state of materials, possess topologically nontrivial valence and conduction bands that touch at a line near the Fermi level. The exotic band structure can lead to various novel properties, such as long-range Coulomb interaction and flat Landau levels. Recently, topological nodal lines have been observed in several bulk materials, such as PtSn4, ZrSiS, TlTaSe2 and PbTaSe2. However, in two-dimensional materials, experimental research on nodal line fermions is still lacking. Here, we report the discovery of two-dimensional Dirac nodal line fermions in monolayer Cu2Si based on combined theoretical calculations and angle-resolved photoemission spectroscopy measurements. The Dirac nodal lines in Cu2Si form two concentric loops centred around the Γ point and are protected by mirror reflection symmetry. Our results establish Cu2Si as a platform to study the novel physical properties in two-dimensional Dirac materials and provide opportunities to realize high-speed low-dissipation devices.<br />Nodal line semimetals have been observed in three-dimensional materials but are missing in two-dimensional counterparts. Here, Feng et al. report two-dimensional Dirac nodal line fermions protected by mirror reflection symmetry in monolayer Cu2Si.
- Subjects :
- Materials science
Science
General Physics and Astronomy
02 engineering and technology
01 natural sciences
General Biochemistry, Genetics and Molecular Biology
Article
Dirac nodal line fermions
symbols.namesake
Condensed Matter::Materials Science
Quantum state
0103 physical sciences
Coulomb
010306 general physics
Electronic band structure
lcsh:Science
Multidisciplinary
Valence (chemistry)
Condensed matter physics
Fermi level
General Chemistry
Landau quantization
Fermion
021001 nanoscience & nanotechnology
Semimetal
symbols
lcsh:Q
0210 nano-technology
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Nature communications 8 (2017): 1007. doi:10.1038/s41467-017-01108-z, info:cnr-pdr/source/autori:Feng, Baojie; Feng, Baojie; Fu, Botao; Kasamatsu, Shusuke; Ito, Suguru; Cheng, Peng; Liu, Cheng Cheng; Feng, Ya; Feng, Ya; Wu, Shilong; Mahatha, Sanjoy K.; Sheverdyaeva, Polina; Moras, Paolo; Arita, Masashi; Sugino, Osamu; Chiang, Tai Chang; Shimada, Kenya; Miyamoto, Koji; Okuda, Taichi; Wu, Kehui; Chen, Lan; Yao, Yugui; Matsuda, Iwao/titolo:Experimental realization of two-dimensional Dirac nodal line fermions in monolayer Cu2<%2Finf>Si/doi:10.1038%2Fs41467-017-01108-z/rivista:Nature communications/anno:2017/pagina_da:1007/pagina_a:/intervallo_pagine:1007/volume:8, Nature Communications, Nature Communications, Vol 8, Iss 1, Pp 1-6 (2017)
- Accession number :
- edsair.doi.dedup.....771d07ecc0a581bb6cf15d82577f678a