Saddle-point van Hove singularity and the phase diagram of high-Tccuprates
Saddle-point van Hove singularity and the phase diagram of high-Tccuprates
复制标题
DOI：
10.1103/physrevb.76.174522
复制
发表时间：
2007-07
影响因子：
3.7
通讯作者：
J. Storey;J. Tallon;J. Tallon;Grant V. M. Williams
中科院分区：
文献类型：
--
作者：
J. Storey;J. Tallon;J. Tallon;Grant V. M. Williams
我们根据强过掺杂区域的通用范霍夫奇点来研究高温铜酸盐超导体的一般相行为。使用刚性 ARPES 导出的色散，我们求解了 BCS 间隙方程，并表明配对相互作用或配对能量截止必定是掺杂的快速下降函数。该结果不利于基于声子的配对相互作用，并且与磁或磁增强相互作用更一致。
We examine the generic phase behavior of high-Tc cuprate superconductors in terms a universal van Hove singularity in the strongly overdoped region. Using a rigid ARPES-derived dispersion we solve the BCS gap equation and show that the pairing interaction or pairing energy cutoff must be a rapidly declining function of doping. This result is prejudicial to a phonon-based pairing interaction and more consistent with a magnetic or magnetically enhanced interaction.