气候变化领域集成服务门户(CCPortal): Moving Dirac nodes by chemical substitution

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DOI	10.1073/pnas.2108617118
	Moving Dirac nodes by chemical substitution
	Nilforoushan N.; Casula M.; Amaricci A.; Caputo M.; Caillaux J.; Khalil L.; Papalazarou E.; Simon P.; Perfetti L.; Vobornik I.; Das P.K.; Fujii J.; Barinov A.; Santos-Cottin D.; Klein Y.; Fabrizio M.; Gauzzi A.; Marsi M.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:33
英文摘要	Dirac fermions play a central role in the study of topological phases, for they can generate a variety of exotic states, such as Weyl semimetals and topological insulators. The control and manipulation of Dirac fermions constitute a fundamental step toward the realization of novel concepts of electronic devices and quantum computation. By means of Angle-Resolved Photo-Emission Spectroscopy (ARPES) experiments and ab initio simulations, here, we show that Dirac states can be effectively tuned by doping a transition metal sulfide, BaNiS2, through Co/Ni substitution. The symmetry and chemical characteristics of this material, combined with the modification of the charge-transfer gap of BaCo1−xNixS2 across its phase diagram, lead to the formation of Dirac lines, whose position in k-space can be displaced along the Γ − M symmetry direction and their form reshaped. Not only does the doping x tailor the location and shape of the Dirac bands, but it also controls the metal-insulator transition in the same compound, making BaCo1−xNixS2 a model system to functionalize Dirac materials by varying the strength of electron correlations. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Correlated electronic systems; Dirac semi-metals; Functional topological materials
语种	英语
scopus关键词	copper; nickel; transition element; angle resolved photoemission spectroscopy; Article; chemical modification; chemical parameters; chemical structure; chemical substitution; dirac node; electron; fermion
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238426
作者单位	Laboratoire de Physique des Solides, Université Paris-Saclay, CNRS, Orsay, 91405, France; Institut de Minéralogie de Physique des Matériaux et de Cosmochimie, Sorbonne Université, CNRS UMR 7590, Museum National d'Histoire Naturelle, Paris, 75252, France; Istituto Officina dei Materiali, Consiglio Nazionale delle Ricerche, Trieste, 34149, Italy; International School for Advanced Studies (SISSA), Trieste, 34136, Italy; Elettra Sincrotrone Trieste, Area Science Park, Trieste, 34149, Italy; Synchrotron SOLEIL, Gif-sur-Yvette, F-91192, France; Laboratoire des Solides Irradiés, CEA/DRF/lRAMIS, CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, Palaiseau, 91128, France; International Centre for Theoretical Physics, Trieste, 34151, Italy
推荐引用方式 GB/T 7714	Nilforoushan N.,Casula M.,Amaricci A.,et al. Moving Dirac nodes by chemical substitution[J],2021,118(33).
APA	Nilforoushan N..,Casula M..,Amaricci A..,Caputo M..,Caillaux J..,...&Marsi M..(2021).Moving Dirac nodes by chemical substitution.Proceedings of the National Academy of Sciences of the United States of America,118(33).
MLA	Nilforoushan N.,et al."Moving Dirac nodes by chemical substitution".Proceedings of the National Academy of Sciences of the United States of America 118.33(2021).