arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 0905.2971cond-mat.str-elcond-mat.supr-con
收藏

铜氧化物超导体赝能隙双流体模型中的电荷2e玻色子

Charge 2e Boson Underlies Two - Fluid Model of the Pseudogap in Cuprate Superconductors

Shiladitya Chakraborty, Philip Phillips

摘要:

从掺杂莫特绝缘体的有效低能理论出发,我们证明了欠掺杂区的有效载流子密度符合双流体描述。也就是说,它具有不同的与温度无关的热活化组分。我们确定的热激活组件作为一个空穴和电荷2e玻色子,这自然发生在有效理论的束缚态。这种状态的热激活解束缚导致奇怪的金属和随后的$T-$线性电阻率。我们发现,掺杂的结合能的依赖性是在很好的协议与实验确定的赝能隙尺度在铜氧化物超导体。

英文摘要:

Starting from the effective low energy theory of a doped Mott insulator, we show that the effective carrier density in the underdoped regime agrees with a two - fluid description. Namely, it has distinct temperature independent and thermally activated components. We identify the thermally activated component as the bound state of a hole and a charge 2e boson, which occurs naturally in the effective theory. The thermally activated unbinding of this state leads to the strange metal and subsequent $T-$linear resistivity. We find that the doping dependence of the binding energy is in excellent agreement with the experimentally determined pseudogap energy scale in 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。

↑