II. Physikalisches Institut, Universität zu Köln, Köln, Germany.
Phys Rev Lett. 2012 Mar 16;108(11):117001. doi: 10.1103/PhysRevLett.108.117001. Epub 2012 Mar 12.
Magnetic correlations in superconducting LiFeAs were studied by elastic and by inelastic neutron-scattering experiments. There is no indication for static magnetic ordering, but inelastic correlations appear at the incommensurate wave vector (0.5±δ,0.5-/+δ,0) with δ~0.07 slightly shifted from the commensurate ordering observed in other FeAs-based compounds. The incommensurate magnetic excitations respond to the opening of the superconducting gap by a transfer of spectral weight.
通过弹性和非弹性中子散射实验研究了超导 LiFeAs 中的磁关联。没有静态磁有序的迹象，但在非共格波矢 (0.5±δ,0.5-/+δ,0) 处出现了非弹性关联，δ~0.07 略偏离于在其他 FeAs 基化合物中观察到的共格有序。非共格磁激发通过转移光谱权重对超导能隙的打开做出响应。
