Theoretical Studies of Underdoped Cuprates

这项拨款中提出的工作涉及对反铁磁性铜酸盐进行仔细的理论研究，因为它们被掺杂并从绝缘的相称的反铁磁性转变为金属超导态。该项目包括分析和数值方法。具体来说，该项目的一部分包含了对空位的费米表面掺杂的演化，态密度和d波超导对的顶点修正的研究。然而，另一个项目涉及对未掺杂和轻掺杂状态下的两个磁振子拉曼散射的仔细分析。最后，他们计划研究受挫量子反铁磁体的临界行为。高Tc超导材料在掺杂并转变为金属超导体之前，最初是绝缘的反铁磁体。该项目由一位年轻的助理教授负责，使用各种技术对这些材料在掺杂过程中的演变进行了仔细而详细的研究。这项研究对于理解这些材料的神秘性质，包括高温超导性的出现至关重要。* * *

9629839 Chubukov The work proposed in this grant involves a careful theoretical study of the antiferromagnetic cuprates as they are doped and transform from an insulating commensurate antiferromagnet to a metallic, superconducting state. The project contains both analytical and numerical approaches. Specifically one part of the project contains a study of the evolution with doping of the Fermi surface of vacancies, of the density of states and the vertex corrections to the d- wave superconducting pairing. Yet another project involves a careful analysis of the two magnon Raman scattering in undoped and lightly doped regimes. Finally there are plans to investigate the critical behavior of a frustrated quantum antiferromagnet. %%% The high Tc superconducting materials start out as an insulating antiferromagnet before they are doped and transformed into metallic superconductors. This project by a young assistant professor, concerns a careful and detailed study, using a variety of techniques, of the evolution of these materials as they are doped. The study is of critical importance in understanding the mysterious properties of these materials including the appearance of high temperature superconductivity. ***