arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2107.01374cond-mat.supr-conphysics.comp-ph
收藏

二维各向异性d波高温超导体中非磁无序引起的散射

Scattering due to non-magnetic disorder in 2D anisotropic d-wave high Tc superconductors

P. Contreras, Dianela Osorio

摘要:

受过渡金属杂质对高温超导体的影响研究以及非常规超导体中Tc的无序抑制研究的启发,我们在紧束缚近似下研究了具有线节点和费米面的二维各向异性高温超导体的无序弹性散射行为.为此,我们进行了详细的自洽的二维数值研究的无序平均散射矩阵的杂质和单线节点序参量,不同的浓度和强度的杂质势的玻恩,中间和单一的限制。在一个各向异性的高Tc超导体中,紧束缚色散律在费米面上平均,包括跳跃参数和序参量与实验数据一致,紧束缚近似反映了各向异性效应。在这项研究中,我们还包括一个详细的可视化的散射矩阵的行为与不同的物理参数集涉及的无序,这使我们能够模拟在不同的制度非常低和高能量的着装散射行为。通过这项研究,我们证明了散射弹性矩阵的非磁性无序的影响,以及与实验一致的序参量和费米面的重要性,当研究这种效果在非常规超导体。

英文摘要:

Inspired by the studies on the influence of transition metal impurities in high Tc superconductors and what is already known about nonmagnetic suppression of Tc in unconventional superconductors, we set out to investigate the behavior of the nonmagnetic disordered elastic scattering for a realistic 2D anisotropic high Tc superconductor with line nodes and a Fermi surface in the tight-binding approximation. For this purpose, we performed a detailed self-consistent 2D numerical study of the disordered averaged scattering matrix with nonmagnetic impurities and a singlet line nodes order parameter, varying the concentration and the strength of the impurities potential in the Born, intermediate and unitary limits. In a high Tc anisotropic superconductor with a tight binding dispersion law averaging over the Fermi surface, including hopping parameters and an order parameter in agreement with experimental data, the tight-binding approximation reflects the anisotropic effects. In this study, we also included a detailed visualization of the behavior of the scattering matrix with different sets of physical parameters involved in the nonmagnetic disorder, which allowed us to model the dressed scattering behavior in different regimes for very low and high energies. With this study, we demonstrate that the scattering elastic matrix is affected by the non-magnetic disorder, as well as the importance of an order parameter and a Fermi surface in agreement with experiments when studying this effect in unconventional 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。

↑