Enhancement of third harmonic emission by interaction of two colored filament with droplet in air

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	Enhancement of third harmonic emission by interaction of two colored filament with droplet in air
	Xi, TT ; Lu, X ; Zhang, J
刊名	OPTICS COMMUNICATIONS
	2009
卷号	282 期号:15 页码:3140
关键词	LIGHT FILAMENTS 3RD-HARMONIC PULSE FEMTOSECOND PULSES LASER-PULSES GENERATION CONVERSION RADIATION
ISSN号	0030-4018
通讯作者	Zhang, J: Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
中文摘要	Antiferromagnetism is relevant to high-temperature (high-T-c) superconductivity because copper oxide and iron arsenide superconductors arise from electron- or hole-doping of their antiferromagnetic parent compounds(1-6). There are two broad classes of explanation for antiferromagnetism: in the 'local moment' picture, appropriate for the insulating copper oxides(1), antiferromagnetic interactions are well described by a Heisenberg Hamiltonian(7,8); whereas in the 'itinerant model', suitable for metallic chromium, antiferromagnetic order arises from quasiparticle excitations of a nested Fermi surface(9,10). There has been contradictory evidence regarding the microscopic origin of the antiferromagnetic order in iron arsenide materials(5,6), with some favouring a localized picture(11-15) and others supporting an itinerant point of view(16-20). More importantly, there has not even been agreement about the simplest effective ground-state Hamiltonian necessary to describe the antiferromagnetic order(21-25). Here, we use inelastic neutron scattering to map spin-wave excitations in CaFe2As2 (refs 26, 27), a parent compound of the iron arsenide family of superconductors. We find that the spin waves in the entire Brillouin zone can be described by an effective three-dimensional local-moment Heisenberg Hamiltonian, but the large in-plane anisotropy cannot. Therefore, magnetism in the parent compounds of iron arsenide superconductors is neither purely local nor purely itinerant, rather it is a complicated mix of the two.
收录类别	SCI
资助信息	National Natural Science Foundation of China [10734130, 10634020, 60621063]; National Basic Research Programme of China [20070815101]; National Hi-tech ICF Programme and the President Fund of GUCAS.
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/311004/37452]
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	Xi, TT,Lu, X,Zhang, J. Enhancement of third harmonic emission by interaction of two colored filament with droplet in air[J]. OPTICS COMMUNICATIONS,2009,282(15):3140.
APA	Xi, TT,Lu, X,&Zhang, J.(2009).Enhancement of third harmonic emission by interaction of two colored filament with droplet in air.OPTICS COMMUNICATIONS,282(15),3140.
MLA	Xi, TT,et al."Enhancement of third harmonic emission by interaction of two colored filament with droplet in air".OPTICS COMMUNICATIONS 282.15(2009):3140.