Stripes, Vibrations and Superconductivity
Stripes, Vibrations and Superconductivity
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条纹、振动和超导性
DOI：
10.1103/physrevb.64.104509
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
A. Neto
中科院分区：
文献类型：
--
作者：
A. Neto
提出了超导铜酸盐的空间调制集体电荷态模型。载流子密度较高的区域(条纹)被描述为Luttinger液体，而密度较低的区域被描述为d{x^2-y^2}空穴对的二维相互作用玻色气体。基元激发之间的相互作用是排斥的，向超导态的转变是由衰变过程驱动的。CCS和晶格的振动虽然不直接参与束缚机制，但对超导电性是基本的。超流密度和晶格具有强烈的调制倾向，这意味着在铜酸盐中仍然没有观察到二聚化的条纹相。该模型的相图具有从一维到二维的交叉行为和伪隙区域，在该区域，序参数的幅度是有限的，但没有建立相干性。我们讨论了自旋涨落的本质和模型中的反常同位素效应。
We propose a model of a spatially modulated collective charge state of superconducting cuprates. The regions of higher carrier density (stripes) are described in terms of Luttinger liquids and the regions of lower density as a two-dimensional interacting bosonic gas of d_{x^2-y^2} hole pairs. The interactions among the elementary excitations are repulsive and the transition to the superconducting state is driven by decay processes. Vibrations of the CCS and the lattice, although not participating directly in the binding mechanism, are fundamental for superconductivity. The superfluid density and the lattice have a strong tendency to modulation implying a still unobserved dimerized stripe phase in cuprates. The phase diagram of the model has a crossover from 1D to 2D behavior and a pseudogap region where the amplitude of the order parameters are finite but phase coherence is not established. We discuss the nature of the spin fluctuations and the unusual isotope effect within the model.
自旋涨落材料的电动力学
DOI：
--
发表时间：
2007
期刊：
影响因子：
--
作者：
V. Stankevich;S. Kimura;他8名;T. Ito;S. Kimura
通讯作者：
S. Kimura