Paramagnetic spin excitations in insulating Rb0.8Fe1.6Se2

CORC > 物理研究所 > 物理所公开发表论文 > 期刊论文

	Paramagnetic spin excitations in insulating Rb0.8Fe1.6Se2
	Wang, MY ; Lu, XY ; Ewings, RA ; Harriger, LW ; Song, Y ; Carr, SV ; Li, CH ; Zhang, R ; Dai, PC
刊名	PHYSICAL REVIEW B
	2013
卷号	87 期号:6
ISSN号	1098-0121
通讯作者	Wang, MY (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
中文摘要	We use neutron scattering to study temperature-dependent spin excitations in insulating antiferromagnetic (AF) Rb0.8Fe1.6Se2. In the low-temperature AF state, spin waves can be accurately described by a local moment Heisenberg Hamiltonian. On warming to around the Neel temperature of T-N = 500 K, low-energy (E < 30 meV) paramagnetic spin excitations form Lorentzian-like quasielastic peaks centered at the AF wave vectors associated with spin waves, while high-energy (E > 50 meV) spin excitations become heavily damped. Upon further warming to above the structural distortion temperature of T-s = 524 K, the entire paramagnetic excitations become overdamped. These results suggest that AF Rb0.8Fe1.6Se2 is not a copper-oxide-like Mott insulator and has less electron correlations compared with metallic iron pnictides and iron chalcogenides. DOI: 10.1103/PhysRevB.87.064409
资助信息	US DOE BES [DE-FG02-05ER46202]; MOST of China 973 programs [2012CB821400, 2011CBA00110]; [NSFC-51002180]
语种	英语
公开日期	2014-01-16
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/57317]
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	Wang, MY,Lu, XY,Ewings, RA,et al. Paramagnetic spin excitations in insulating Rb0.8Fe1.6Se2[J]. PHYSICAL REVIEW B,2013,87(6).
APA	Wang, MY.,Lu, XY.,Ewings, RA.,Harriger, LW.,Song, Y.,...&Dai, PC.(2013).Paramagnetic spin excitations in insulating Rb0.8Fe1.6Se2.PHYSICAL REVIEW B,87(6).
MLA	Wang, MY,et al."Paramagnetic spin excitations in insulating Rb0.8Fe1.6Se2".PHYSICAL REVIEW B 87.6(2013).