Superconducting gap ratio from strange metal phase in the absence of quasiparticles
Superconducting gap ratio from strange metal phase in the absence of quasiparticles
复制标题
没有准粒子时奇异金属相的超导间隙比
DOI：
10.1088/1572-9494/abd0e9
复制
发表时间：
2021
影响因子：
3.1
通讯作者：
Ge Xianhui
中科院分区：
文献类型：
--
作者：
Cai Wenhe;Ge Xianhui
由三阶张量模型驱动的强相互作用电子的晶格模型为理解高温超导的配对机制提供了工具。这种类似 Sachdev-Ye-Kitaev 的模型描述了铜酸盐高温超导体中的奇怪金属相。我们的计算表明，由于耦合项和自旋算符的影响，该模型中的超导间隙比高于BCS理论中的超导间隙比。在一定条件下，该比率也符合BCS理论。我们的结果与强耦合的情况有关，因此它可能为深入了解铜酸盐高温超导体铺平道路。
A lattice model for strongly interacting electrons motivated by a rank-3 tensor model provides a tool for understanding the pairing mechanism of high-temperature superconductivity. This Sachdev-Ye-Kitaev-like model describes the strange metal phase in the cuprate high temperature superconductors. Our calculation indicates that the superconducting gap ratio in this model is higher than the ratio in the BCS theory due to the coupling term and the spin operator. Under certain conditions, the ratio also agrees with the BCS theory. Our results relate to the case of strong coupling, so it may pave the way to gaining insight into the cuprate high temperature superconductors.