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Incommensurate Spin Fluctuations in High-Transition Temperature Superconductors

机译:高转变温度超导体中自旋的波动不相称

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Neutron scattering experiments have revealed a fascinating interplay between the hole doping, the spin fluctuations, and the superconductivity of the cuprate superconductors. Recently, electrochemical techniques have been used to produce large single crystals of La_2CuO_(4+y), which has mobile oxygen dopants. Staging behavior of the excess oxygen has been demonstrated, and the low-energy spin fluctuations in stage 6 La_2CuO_(4+y) have been measured. The spin fluctuations are incommensurate with the lattice and have spatial, energy, and temperature dependencies very much like those in La_(2-x)Sr_xCuO_4, with similar high transition temperature. This establishes the universality of the incommensurate spin fluctuations among the La_2CuO_4-based superconductors.
机译:中子散射实验表明,空穴掺杂,自旋涨落和铜酸盐超导体的超导性之间具有令人着迷的相互作用。最近,电化学技术已被用于生产具有移动性氧掺杂剂的La_2CuO_(4 + y)大单晶。已经证明了过量氧气的分级行为,并且已经测量了阶段6 La_2CuO_(4 + y)中的低能自旋波动。自旋涨落与晶格不相称,并且具有空间,能量和温度依赖性,这与La_(2-x)Sr_xCuO_4中的涨落温度非常相似。这建立了基于La_2CuO_4的超导体之间不相称的自旋涨落的普遍性。

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