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arXiv 1302.7073cond-mat.supr-con
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双层铜氧化物超导体中超导电性与赝能隙态的相互作用

Interplay between superconductivity and pseudogap state in bilayer cuprate superconductors

Yu Lan, Jihong Qin, Shiping Feng

摘要:

基于动能驱动的超导机制,研究了双层铜氧化物超导体中超导能隙与正常态赝能隙之间的相互作用。结果表明,层间自旋激发的相干跃迁直接产生的载流子相互作用对粒子-空穴沟道中的正常态赝能隙和粒子-粒子沟道中的超导能隙没有贡献,而只有直接来自通过交换自旋激发的动能跳跃的层内载流子相互作用才诱导正常的-态赝能隙和超导能隙,从而双能隙行为是单层和双层铜氧化物超导体的普遍特征。

英文摘要:

The interplay between the superconducting gap and normal-state pseudogap in the bilayer cuprate superconductors is studied based on the kinetic energy driven superconducting mechanism. It is shown that the charge carrier interaction directly from the interlayer coherent hopping in the kinetic energy by exchanging spin excitations does not provide the contribution to the normal-state pseudogap in the particle-hole channel and superconducting gap in the particle-particle channel, while only the charge carrier interaction directly from the intralayer hopping in the kinetic energy by exchanging spin excitations induces the normal-state pseudogap in the particle-hole channel and superconducting gap in the particle-particle channel, and then the two-gap behavior is a universal feature for the single layer and bilayer cuprate superconductors.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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