Ordering and Dynamics of Vortex Matter

涡旋物质的有序性和动力学

• 批准号: 10640367
• 负责人: KAWAMURA Hikaru
• 金额: $ 1.73万
• 依托单位: Osaka University (1999)Kyoto Institute of Technology (1998)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10640367/
• 关键词: vortex; vortex line; High-Tc superconductor; phase diagram; screening; chiral glass; vortcx glass; Monte Carlo simulation; 渦系; 高温超伝導

Due to the enhanced effect of fluctuations, the problem of the phase diagram of high-TィイD2cィエD2 superconductors in applied magnetic fields is highly nontrivial and has attracted much recent interest. For random type-II superconductors with point disorder, possible existence of an equilibrium thermodynamic phase called the vortex-glass phase, where the vortex was pinned on long length scale by randomly distributed point-pinning centers, was proposed. In the project, stability of the three-dimensional vortex-glass order in random type-II superconductors with point disorder is investigated by equilibrium Monte Carlo simulations based on a lattice XY model with a uniform field threading the system. It is found that the vortex-glass order, which stably exists in the absence of screening, is destroyed by the screening effect, corroborating the previous finding based on the spatially isotropic gauge-glass model. Estimated critical exponents, however, deviate considerably from the values reported for the gauge-glass model.

由于涨落的增强效应，高温超导体D2c超导体D2c超导体在外加磁场中的相图问题是非常重要的，近年来引起了人们的极大兴趣。对于具有点无序的随机II型超导体，可能存在称为涡旋玻璃相的平衡热力学相，其中涡旋被随机分布的点钉扎中心钉扎在长尺度上。在该项目中，在具有点无序的随机II型超导体中的三维涡旋玻璃有序的稳定性通过基于具有穿过系统的均匀场的晶格XY模型的平衡Monte Carlo模拟来研究。结果发现，涡玻璃秩序，稳定存在的情况下，屏蔽，被破坏的屏蔽效应，证实了以前的发现的基础上的空间各向同性的规范玻璃模型。估计的临界指数，但是，偏离相当大的值报告的玻璃表模型。

项目成果

K. Hukuslrima: "Chiral-Glass Transition and Replica Symmetry Breaking of a Three-Dimensioral Heisenberg Spin Glass"Phgs. Rev.. E61. R1008-R1011 (2000)

K. Hukuslrima：“三维海森堡自旋玻璃的手性玻璃转变和复制对称性破缺”Phgs。

I.A.Campbell: "Spin Glass Dynamics" J.Magn.Magn.Mater.177-181. 63-66 (1998)

I.A.Campbell：“自旋玻璃动力学”J.Magn.Magn.Mater.177-181。

H.Kawamura: "Dynamical Properties of Chiral-Glass Order in Ceramic Higt-Tc Superconductors"J.Phys.Soc.Jpn.. (to appear). (2000)

H.Kawamura：“陶瓷高温超导体中手性玻璃有序的动态特性”J.Phys.Soc.Jpn..（待发表）。

H.Kawamura: "Dynamical Aspects of Equilibrium and OH-Equilibrium Simulations of a Three-Dinensional Heisenberg Spin Glass"Int.J.Mod.Phys.. C10. 1-11 (1999)

H.Kawamura：“三维海森堡自旋玻璃的平衡和 OH 平衡模拟的动态方面”Int.J.Mod.Phys.. C10。

H. Kawainura: "Dynamical Aspeots of Equilibrium and off-Equilibrium Simulations of a Three-Dinensioral Heisenberg Spin Glass"Int. J. Mod. Phys.. C10. 1-11 (1999)

H. Kawainura：“三维海森堡自旋玻璃的平衡和非平衡模拟的动态方面”Int。