期刊
PHYSICAL REVIEW LETTERS
卷 107, 期 17, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.107.177003
关键词
-
资金
- Materials Sciences and Engineering Division of the Office of Basic Energy Sciences, Office of Science, U.S. Department of Energy [DE-AC02-06CH11357]
- DAAD PPP USA [50750339]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [906953] Funding Source: National Science Foundation
We report inelastic neutron scattering measurements of the resonant spin excitations in Ba1-xKxFe2As2 over a broad range of electron band filling. The fall in the superconducting transition temperature with hole doping coincides with the magnetic excitations splitting into two incommensurate peaks because of the growing mismatch in the hole and electron Fermi surface volumes, as confirmed by a tight-binding model with s(+/-)-symmetry pairing. The reduction in Fermi surface nesting is accompanied by a collapse of the resonance binding energy and its spectral weight, caused by the weakening of electron-electron correlations.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据