Cooperative Phenomena in Systems of Restricted Dimensionality

受限维系统中的合作现象

• 批准号: 9627459
• 负责人: Sebastian Doniach
• 金额: $ 21.6万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-07-01 至 1999-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9627459&HistoricalAwards=false
• 关键词: Cooperative; Phenomena; Systems; Restricted; Dimensionality

9627459 Doniach This grant further continues the support of this senior, distinguished PI on the general problem of strongly correlated electrons. Specific projects in the present grant include: Exact diagonalization of a t-J model using a projector technique developed earlier by the PI, properties of a superconductor-insulator transition utilizing a generalization of the Doniach-Inui lagrangian incorporating both charge and spin fluctuations and effects of dissipation and of high magnetic fields, and a dynamic mean field (the infinite dimension limit) study of the Kondo insulators. %%% This grant explores several novel ideas about the properties of Copper oxides in the range of doping where they are no longer High Tc superconductors. This is done with the hope of elucidating the microscopic properties of these special materials. In another project the PI will study the Kondo insulators (materials which are metallic and magnetic at high temperatures and nonmagnetic and insulating at low temperatures) using some recently discovered mathematical techniques. ***

9627459 Doniach 这项资助进一步延续了这位资深、杰出的 PI 对强相关电子的一般问题的支持。 目前拨款的具体项目包括：使用 PI 早期开发的投影仪技术对 t-J 模型进行精确对角化，利用 Doniach-Inui 拉格朗日的推广来研究超导-绝缘体转变的特性，其中包含电荷和自旋涨落以及耗散和高磁场的影响，以及近藤绝缘体的动态平均场（无限维限制）研究。 %%% 这项资助探索了关于铜氧化物在掺杂范围内的特性的几个新想法，其中它们不再是高温超导体。 这样做的目的是希望阐明这些特殊材料的微观特性。 在另一个项目中，PI 将使用一些最近发现的数学技术来研究近藤绝缘体（在高温下为金属和磁性材料，在低温下为非磁性和绝缘材料）。 ***