期刊
PHYSICAL REVIEW LETTERS
卷 111, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.111.096404
关键词
-
资金
- Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, U.S. Department of Energy [DE-AC02-98CH10886]
- DOE Office of Basic Energy Sciences
- DOE [DE-AC52-06NA25396]
The temperature evolution of structural effects associated with charge order (CO) and spin order in La1.67Sr0.33NiO4 has been investigated using neutron powder diffraction. We report an anomalous shrinking of the c / a lattice parameter ratio that correlates with T-CO. The sign of this change can be explained by the change in interlayer Coulomb energy between the static-stripe-ordered state and the fluctuating-stripe-ordered state or the charge-disordered state. In addition, we identify a contribution to the mean-square displacements of Ni and in-plane O atoms whose width correlates quite well with the size of the pseudogap extracted from the reported optical conductivity, with a non-Debye-like component that persists below and well above T-CO. We infer that dynamic charge-stripe correlations survive to T similar to 2T(CO).
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