Temperature dependence of the resonance and low-energy spin excitations in superconducting FeTe0.6Se0.4

CORC > 物理研究所 > 物理所公开发表论文 > 期刊论文

	Temperature dependence of the resonance and low-energy spin excitations in superconducting FeTe0.6Se0.4
	Harriger, LW ; Lipscombe, OJ ; Zhang, CL ; Luo, HQ ; Wang, M ; Marty, K ; Lumsden, MD ; Dai, PC
刊名	PHYSICAL REVIEW B
	2012
卷号	85 期号:5
关键词	MAGNETIC-RESONANCE NEUTRON-SCATTERING PAIRING SYMMETRY STATE PHASE ORDER
ISSN号	1098-0121
通讯作者	Harriger, LW (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
中文摘要	We use inelastic neutron scattering to study the temperature dependence of the low-energy spin excitations in single crystals of superconducting FeTe0.6Se0.4 (T-c = 14 K). In the low-temperature superconducting state, the imaginary part of the dynamic susceptibility at the electron and hole Fermi-surfaces nesting wave vector Q = (0.5, 0.5), chi '' (Q, omega), has a small spin gap, a two-dimensional neutron spin resonance above the spin gap, and increases linearly with increasing (h) over bar omega for energies above the resonance. While the intensity of the resonance decreases like an order parameter with increasing temperature and disappears at temperature slightly above T-c, the energy of the mode is weakly temperature dependent and vanishes concurrently above T-c. This suggests that in spite of its similarities with the resonance in electron-doped superconducting BaFe2-x (Co, Ni)(x)As-2, the mode in FeTe0.6Se0.4 is not directly associated with the superconducting electronic gap.
收录类别	SCI
资助信息	US NSF [DMR-1063866]; US DOE BES [DE-FG02-05ER46202]; Chinese Academy of Sciences; Ministry of Science and Technology of China [2012CB821400, 2011CBA00110]; US Department of Energy, Division of Scientific User Facilities, Basic Energy Sciences
语种	英语
公开日期	2013-09-23
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/44780]
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	Harriger, LW,Lipscombe, OJ,Zhang, CL,et al. Temperature dependence of the resonance and low-energy spin excitations in superconducting FeTe0.6Se0.4[J]. PHYSICAL REVIEW B,2012,85(5).
APA	Harriger, LW.,Lipscombe, OJ.,Zhang, CL.,Luo, HQ.,Wang, M.,...&Dai, PC.(2012).Temperature dependence of the resonance and low-energy spin excitations in superconducting FeTe0.6Se0.4.PHYSICAL REVIEW B,85(5).
MLA	Harriger, LW,et al."Temperature dependence of the resonance and low-energy spin excitations in superconducting FeTe0.6Se0.4".PHYSICAL REVIEW B 85.5(2012).