Low-energy magnetic excitations from the Fe1+y-z(Ni/Cu)(z)Te1-xSex system

Article

关键词: HIGH-TEMPERATURE SUPERCONDUCTIVITY;    SPIN EXCITATIONS;    NEUTRON-SCATTERING;    DYNAMICS;    STATE;   

DOI  :  10.1103/PhysRevB.89.174517

来源: SCIE

【 摘 要 】

We report neutron scattering measurements on low-energy ((h) over bar omega similar to 5 meV) magnetic excitations from a series of Fe1+y-z(Ni/Cu)(z)Te1-xSex samples which belong to the 11 Fe-chalcogenide family. Our results suggest a strong correlation between the magnetic excitations near (0.5,0.5,0) and the superconducting properties of the system. The low-energy magnetic excitations are found to gradually move away from (0.5,0.5,0) to incommensurate positions when superconductivity is suppressed, either by heating or chemical doping, confirming previous observations.

【 授权许可】

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