Orbital characters and electronic correlations in KCo2Se2
文献类型：期刊论文
| 作者 | Liu, ZH; Zhao, YG; Li, Y; Jia, LL; Cai, YP; Zhou, S ; Xia, TL; Buchner, B; Borisenko, SV; Wang, SC
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| 刊名 | JOURNAL OF PHYSICS-CONDENSED MATTER
 |
| 出版日期 | 2015 |
| 卷号 | 27期号:29页码:295501 |
| 关键词 | orbital characters electronic correlations KCo2Se2 |
| 通讯作者 | Liu, ZH (reprint author), Renmin Univ, Dept Phys, Beijing 100872, Peoples R China. |
| 英文摘要 | We 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. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Condensed Matter |
| 关键词[WOS] | SUPERCONDUCTIVITY ; PHOTOEMISSION |
| 收录类别 | SCI |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/20913]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 推荐引用方式 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.,...&Wang, SC.(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. |
入库方式： OAI收割
来源：理论物理研究所
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