Investigation of novel ordered phases for Fermion systems in very low temperatures

我们主要研究了以下两个问题：第一个是有机导体中的场致自旋密度波（FISDW）跃迁。我们发现，FISDW的特点是共存的许多prder参数。这一鉴别使我们能够理解与之相关的各种奥秘，即级联跃迁和量子化霍尔电导的符号反转。第二个是关于重电子系统UPt ~ 3中超导配对函数的鉴别。我们已经发现，属于一个一维表示与奇宇称的状态是最适合现有的实验。我们提出了各种实验来验证我们的理论，包括相图和涡旋结构。

We have investigated the following two thema : The first concerns the field-induced spin density wave (FISDW) transition in organic conductors. We have found that FISDW is characterized by coexistence of many prder parameters. This identification allows us to understand various mysteries associated ; namely the cascade transitions and the sign reversal of the quantized Hall conductance.The second concerns the identification of the superconducting pairing funct function in a heavy electron system UPt3. We have found that the state belonging to a one-dimensional representation with odd parity is best fit to the existing experiments. We propose on this identification various experiments to check our theory, including the phase diagram and vortex structures.