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Liu, ZH; Zhao, YG; Li, Y; Jia, LL; Cai, YP; Zhou, S; Xia, TL; Buchner, B; Borisenko, SV; Wang, SC; Liu, ZH (reprint author), Renmin Univ, Dept Phys, Beijing 100872, Peoples R China.
Orbital characters and electronic correlations in KCo2Se2
Source PublicationJOURNAL OF PHYSICS-CONDENSED MATTER
Language英语
KeywordOrbital Characters Electronic Correlations Kco2se2
AbstractWe report a comprehensive study of the tridimensional nature and orbital characters of the low-energy electronic structure in KCo2Se2, using polarization-and photon energy-dependent angle-resolved photoemission spectroscopy. We observed one electron-like Fermi surface (FS) at the Brillouin zone (BZ) center, four electron-like FSs centered at the BZ corner, and one hole-like FS at the BZ boundary. The FSs show weak dispersion along the k(z) direction, indicating the near-two-dimensional nature of FSs in KCo2Se2. In combination with the local-density approximation calculations, we determined the orbital characters of the lowenergy electronic bands, which are mainly derived from the Co 3d orbital, mixed with part of the Se 4p states. The d(x2-y2) orbital gives a significant contribution to the band crossing the Fermi level. A band renormalization of about 1.6 is needed to capture the essential dispersive features, which suggests that electronic correlations are much weaker than that in KyFe2-xSe2.
2015
Volume27Issue:29Pages:295501
Subject AreaPhysics
DOIhttp://dx.doi.org/10.1088/0953-8984/27/29/295501
Indexed BySCI
Funding OrganizationChinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; National Science Foundation of China [11274381, 11004245] ; National Science Foundation of China [11274381, 11004245] ; National Science Foundation of China [11274381, 11004245] ; National Science Foundation of China [11274381, 11004245] ; National Science Foundation [DMR-0537588] ; National Science Foundation [DMR-0537588] ; National Science Foundation [DMR-0537588] ; National Science Foundation [DMR-0537588] ; [BO1912/2-2] ; [BO1912/2-2] ; [BO1912/2-2] ; [BO1912/2-2] ; [BO1912/3-1] ; [BO1912/3-1] ; [BO1912/3-1] ; [BO1912/3-1] ; [BE1749/13] ; [BE1749/13] ; [BE1749/13] ; [BE1749/13]
Citation statistics
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/20913
Collection理论物理所科研产出_SCI论文
Corresponding AuthorLiu, ZH (reprint author), Renmin Univ, Dept Phys, Beijing 100872, Peoples R China.
Recommended Citation
GB/T 7714
Liu, ZH,Zhao, YG,Li, Y,et al. Orbital characters and electronic correlations in KCo2Se2[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,2015,27(29):295501.
APA Liu, ZH.,Zhao, YG.,Li, Y.,Jia, LL.,Cai, YP.,...&Liu, ZH .(2015).Orbital characters and electronic correlations in KCo2Se2.JOURNAL OF PHYSICS-CONDENSED MATTER,27(29),295501.
MLA Liu, ZH,et al."Orbital characters and electronic correlations in KCo2Se2".JOURNAL OF PHYSICS-CONDENSED MATTER 27.29(2015):295501.
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