YBa2Cu3O7: A nearly antiferromagnetic Fermi liquid.
YBa2Cu3O7: A nearly antiferromagnetic Fermi liquid.
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YBa2Cu3O7：一种近反铁磁性的费米液体。
DOI：
10.1103/physrevb.47.6069
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
Pines
中科院分区：
文献类型：
--
作者：
Monthoux;Pines
利用Eliashberg方法进行了强耦合计算，为将YBa2Cu3O7中的平面准粒子描述为近反铁磁费米液体提供了强有力的证据.我们表明，当考虑到完整结构时（在频率和动量空间）的自旋涨落引起的准粒子间相互作用，得到超导转变温度为90 K，无量纲耦合常数λ= 0.402 N（0）g=0.83，空穴浓度为0.25，准粒子谱特征为最近邻跳跃，t=0.25 eV，以及由实验确定的自旋涨落谱
We have carried out strong-coupling calculations using the Eliashberg formalism, which provide strong evidence for the description of the planar quasiparticles in YBa 2 Cu 3 O 7 as a nearly antiferromagnetic Fermi liquid. We show that when one takes into account the full structure (in frequency and momentum space) of the spin-fluctuation-induced interaction between quasiparticles, a superconducting transition temperature of 90 K is obtained with a dimensionless coupling constant, λ=0.402N(0)g=0.83, for a hole concentration of 0.25, a quasiparticle spectrum characterized by nearest-neighbor hopping, t=0.25 eV, and a spin-fluctuation spectrum determined by experiment