arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0902.1361cond-mat.supr-con
收藏

铜氧化物超导体反相条纹相的光谱和光学性质

Spectral and optical properties in the antiphase stripe phase of the cuprate superconductors

Hong-Min Jiang, Cui-Ping Chen, Jian-Xin Li

摘要:

研究了具有自旋(电荷)域导出散射势$V_{s}$($V_{c}$)的条形模型中的超导序参量、光谱和光学性质。结果表明,电荷畴散射对超导性的抑制作用不如自旋散射有效。对于$V_{s}\gg V_{c}$,光谱权重集中在($π,0$)波腹区域,随着Drude峰的消失,电导率中出现有限能量峰。而对于$V_{s}\approx V_{c}$,光谱权重集中在($π/2,π/2$)节区,电导率存在残余Drude峰,没有有限能量峰。这些结果一致占在ARPES和光学电导率实验中的分歧意见在几个高$T_c$铜酸盐,并建议,“绝缘”和“金属”属性是固有的条纹状态,取决于自旋和电荷域衍生的散射电位的相对强度。

英文摘要:

We investigate the superconducting order parameter, the spectral and optical properties in a stripe model with spin (charge) domain-derived scattering potential $V_{s}$ ($V_{c}$). We show that the charge domain-derived scattering is less effective than the spin scattering on the suppression of superconductivity. For $V_{s}\gg V_{c}$, the spectral weight concentrates on the ($π,0$) antinodal region, and a finite energy peak appears in the optical conductivity with the disappearance of the Drude peak. But for $V_{s}\approx V_{c}$, the spectral weight concentrates on the ($π/2,π/2$) nodal region, and a residual Drude peak exists in the optical conductivity without the finite energy peak. These results consistently account for the divergent observations in the ARPES and optical conductivity experiments in several high-$T_c$ cuprates, and suggest that the "insulating" and "metallic" properties are intrinsic to the stripe state, depending on the relative strength of the spin and charge domain-derived scattering potentials.

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。

↑