Tunable (δπ, δπ)-Type Antiferromagnetic Order in α-Fe(Te,Se) Superconductors
作者： Wei Bao , Y. Qiu , Q. Huang , M. A. Green , P. Zajdel
DOI: 10.1103/PHYSREVLETT.102.247001
关键词:
摘要: The new $\ensuremath{\alpha}$-Fe(Te,Se) superconductors share the common iron building block and ferminology with LaFeAsO ${\mathrm{BaFe}}_{2}{\mathrm{As}}_{2}$ families of superconductors. In contrast predicted commensurate spin-density-wave order at nesting wave vector ($\ensuremath{\pi}$, 0), a completely different magnetic composition tunable propagation ($\ensuremath{\delta}\ensuremath{\pi}$, $\ensuremath{\delta}\ensuremath{\pi}$) was determined for parent compound ${\mathrm{Fe}}_{1+y}\mathrm{Te}$ in this powder single-crystal neutron diffraction study. antiferromagnetic survives as short-range one even highest ${T}_{C}$ sample. An alternative to prevailing Fermi surface mechanism is required understand latest family ferrous
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