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

极低温度下费米子系统新型有序相的研究

• 批准号: 04640370
• 负责人: MACHIDA Kazushige
• 金额: $ 1.22万
• 依托单位: Okayama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04640370/
• 关键词: Organic conductor; Field-induced spin density wave; Quantized Hall effect; Heavy Fermion system; Superconductivity; Vortex structure; 有機物質; 磁場誘起相転移; Цpt_3

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.

我们研究了以下两个问题：第一个是有机导体中场致自旋密度波（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。

项目成果

K.Machida: "Vortex structures in an anisotropic superconducting" J.Phys.Soc.Jpn.62. 680-689 (1993)

K.Machida：“各向异性超导中的涡流结构”J.Phys.Soc.Jpn.62。

Y.Hasegawa, K.Machida, M.Kohmoto, V.Yakovenko: "Quntum Hall Effect in Field Induced Spin Density Wave State submitted to Organic Superconductivity" (in press).

Y.Hasekawa、K.Machida、M.Kohmoto、V.Yakovenko：“场诱导自旋密度波态中的量子霍尔效应提交给有机超导”（正在出版）。

Y.Hori, K.Machida and M.Nakano: "Theory of Field-Induced Spin Density Wave States in Bechgaard Salts : (TMTSF)_2X" Physica. B184. 503-507 (1993)

Y.Hori、K.Machida 和 M.Nakano：“Bechgaard 盐中场致自旋密度波态理论：(TMTSF)_2X”物理学。

K.Machida, T.Ohmi and M.Ozaki: "Superconducting Properties of a Heavy Electron Material UPt_3" J.Phys.Soc.Jpn.62. 2879-2893 (1993)

K.Machida、T.Ohmi 和 M.Ozaki：“重电子材料 UPt_3 的超导特性”J.Phys.Soc.Jpn.62。

K.Machida: "Recent progress of researchon suporcorductivity of a heauy fermion compound UPt_3" Prog.Theor.Phys.Suppl.108. 229-250 (1992)

K.Machida：“重费米子化合物 UPt_3 超导性研究的最新进展”Prog.Theor.Phys.Suppl.108。