Highly Correlated Metals and Insulators

无序存在下的电子和磁性相互作用在低温下提供了各种各样的集体效应。他们建议研究：(i)从反铁磁绝缘体到相关金属的Mott-Hubbard跃迁，既在库仑相互作用单独占主导地位的极限下，也在电子相互作用和无序的影响可比较的极限下。在开尔文以上、以下以及金属-绝缘体转变温度下进行实验，应该有助于消除这些相互竞争的影响。（ii）过渡金属和稀土氧化物的绝缘性能，其中在低温下用电子和磁性玻璃性来描述似乎是最合适的；（iii）重费米子化合物中相关增强的金属性能和各向异性超导顺序。

Electronic and magnetic interactions in the presence of disorder provide for a wide variety of collective effects at low temperatures. They propose to study: (i) The Mott-Hubbard transition from the antiferromagnetic insulator to the correlated metal, both in the limit where Coulomb interactions alone dominate and where the effects of electron interactions and disorder are comparable. Experiments at milliKelvin temperatures above, below, and at the metal-insulator transition should help deconvulate these competing effects. (ii) The insulating properties of transition metal and rare earth oxides, where a description in terms of both electronic and magnetic glassiness appears to be most appropriate at low temperatures, and (iii) The correlation-enhanced metallic properties and the anisotropic superconducting order in heavy fermion compounds.