Coexistence of Ferromagnetic and Stripe Antiferromagnetic Spin Fluctuations in SrCo2As2

doi:10.1103/PhysRevLett.122.117204

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Coexistence of Ferromagnetic and Stripe Antiferromagnetic Spin Fluctuations in SrCo2As2
	Li, Y ; Yin, ZP ; Liu, ZH ; Wang, WY ; Xu, Z ; Song, Y ; Tian, L ; Huang, YB ; Shen, DW ; Abernathy, DL
刊名	PHYSICAL REVIEW LETTERS
	2019
卷号	122 期号:11 页码:—
关键词	IRON PNICTIDES SUPERCONDUCTIVITY DYNAMICS BEHAVIOR
ISSN号	0031-9007
DOI	10.1103/PhysRevLett.122.117204
文献子类	期刊论文
英文摘要	We use inelastic neutron scattering to study energy and wave vector dependence of spin fluctuations in SrCo2As2, derived from SrFe2-xCoxAs2 iron pnictide superconductors. Our data reveal the coexistence of antiferromagnetic (AF) and ferromagnetic ( FM) spin fluctuations at wave vectors Q(AF) = (1, 0) and Q(FM) = (0, 0)/(2, 0), respectively. By comparing neutron scattering results with those of dynamic mean field theory calculation and angle- resolved photoemission spectroscopy experiments, we conclude that both AF and FM spin fluctuations in SrCo2As2 are closely associated with a flatband of the e(g) orbitals near the Fermi level, different from the t(2g) orbitals in superconducting SrFe2-xCoxAs2. Therefore, Co substitution in SrFe2-xCoxAs2 induces a t(2g) to e(g) orbital switching, and is responsible for FM spin fluctuations detrimental to the singlet pairing superconductivity.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/31514]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA; 2.Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China; 3.Chinese Acad Sci, State Key Lab Funct Mat Informat, SIMIT, Shanghai 200050, Peoples R China; 4.Chinese Acad Sci, Ctr Excellence Superconducting Elect, SIMIT, Shanghai 200050, Peoples R China; 5.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China; 6.Oak Ridge Natl Lab, Neutron Scattering Div, Oak Ridge, TN 37831 USA; 7.STFC Rutherford Appleton Lab, ISIS Pulsed Neutron & Muon Source, Didcot OX11 0QX, Oxon, England; 8.Univ Paris Saclay, CEA Saclay, CEA CNRS, Lab Leon Brillouin, F-91191 Gif Sur Yvette, France; 9.Inst Laue Langevin, 6 Rue Jules Horowitz,Boite Postale 156, F-38042 Grenoble 9, France; 10.Forschungszentrum Julich, Heinz Maier Leibnitz Zentrum MLZ, JCNS, Lichtenbergstr 1, D-85747 Garching, Germany
推荐引用方式 GB/T 7714	Li, Y,Yin, ZP,Liu, ZH,et al. Coexistence of Ferromagnetic and Stripe Antiferromagnetic Spin Fluctuations in SrCo2As2[J]. PHYSICAL REVIEW LETTERS,2019,122(11):—.
APA	Li, Y.,Yin, ZP.,Liu, ZH.,Wang, WY.,Xu, Z.,...&Dai, PC.(2019).Coexistence of Ferromagnetic and Stripe Antiferromagnetic Spin Fluctuations in SrCo2As2.PHYSICAL REVIEW LETTERS,122(11),—.
MLA	Li, Y,et al."Coexistence of Ferromagnetic and Stripe Antiferromagnetic Spin Fluctuations in SrCo2As2".PHYSICAL REVIEW LETTERS 122.11(2019):—.