Absence of a Holelike Fermi Surface for the Iron-Based K0.8Fe1.7Se2 Superconductor Revealed by Angle-Resolved Photoemission Spectroscopy

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	Absence of a Holelike Fermi Surface for the Iron-Based K0.8Fe1.7Se2 Superconductor Revealed by Angle-Resolved Photoemission Spectroscopy
	Qian, T ; Wang, XP ; Jin, WC ; Zhang, P ; Richard, P ; Xu, G ; Dai, X ; Fang, Z ; Guo, JG ; Chen, XL ; Ding, H
刊名	PHYSICAL REVIEW LETTERS
	2011
卷号	106 期号:18
关键词	BA0.6K0.4FE2AS2
ISSN号	0031-9007
通讯作者	Qian, T: Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
中文摘要	On the basis of our idea of degree modulation, by using systematic first-principles calculations, we study the electronic structure and magnetic properties of SrCrO3. Our results suggest that SrCrO3 is a weakly correlated antiferromagnetic (AF) metal, a very rare situation in transition-metal oxides. Among various possible AF states, C-type spin ordering with a small amount of orbital polarization (the d(xy) orbital is more occupied than the d(yz/zx) orbital) is favored. The detailed understanding of the mechanism that stabilizes the C-type AF state is analyzed on the basis of the competition between itinerant Stoner instability and superexchange, and our results suggest that magnetic instability rather than lattice or charge instabilities plays an important role in this system. The experimentally observed c-axis compressed tetragonal distortion can be naturally explained with the C-type AF state. By using the LDA + U method to study this system, we show that the wrong ground state will be obtained if U is large.
收录类别	SCI
资助信息	Chinese Academy of Sciences [2010Y1JB6]; Ministry of Science and Technology of China [2010CB923000]; Chinese National Science Foundation [11004232, 11050110422]
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/33420]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Qian, T,Wang, XP,Jin, WC,et al. Absence of a Holelike Fermi Surface for the Iron-Based K0.8Fe1.7Se2 Superconductor Revealed by Angle-Resolved Photoemission Spectroscopy[J]. PHYSICAL REVIEW LETTERS,2011,106(18).
APA	Qian, T.,Wang, XP.,Jin, WC.,Zhang, P.,Richard, P.,...&Ding, H.(2011).Absence of a Holelike Fermi Surface for the Iron-Based K0.8Fe1.7Se2 Superconductor Revealed by Angle-Resolved Photoemission Spectroscopy.PHYSICAL REVIEW LETTERS,106(18).
MLA	Qian, T,et al."Absence of a Holelike Fermi Surface for the Iron-Based K0.8Fe1.7Se2 Superconductor Revealed by Angle-Resolved Photoemission Spectroscopy".PHYSICAL REVIEW LETTERS 106.18(2011).