Computer simulation on vortex dynamics in type II superconductors

II型超导体中涡动力学的计算机模拟

• 批准号: 18540360
• 负责人: XIAO Hu
• 金额: $ 2.17万
• 依托单位: National Institute for Materials Science
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18540360/
• 关键词: superconductivity vortex state; dynamics; depin transition; creep; scaling; computer simulation; glass state; Arrhenius law

Using dynamical computer simulation we have investigated vortex matters in glass states. A genuine continuous depinning transition is observed at zero temperature, which also governs the low-temperature creep motion. With the notion of scaling, we evaluate in high accuracy critical exponents and scaling functions; we observe a non-Arrhenius creep motion for weak collective pinning where Bragg glass (BrG) is stabilized at equilibrium, while for strong pinning the well-known Arrhenius law is recovered. In both cases, a sharp crossover takes place between depinning and creep at low temperatures.

利用计算机动力学模拟方法研究了玻璃态涡旋物质。一个真正的连续脱钉过渡观察到在零温度下，这也支配低温蠕变运动。与缩放的概念，我们评估在高精度的临界指数和标度函数，我们观察到一个非阿克里乌斯蠕变运动弱集体钉扎布拉格玻璃（BrG）稳定在平衡，而强钉扎著名的阿克里乌斯定律恢复。在这两种情况下，在低温下，在脱钉和蠕变之间发生急剧的交叉。

项目成果

Depinning and creep motion in glass states of flux lines

• DOI: 10.1103/physrevlett.98.267002
• 发表时间: 2007-06-29
• 期刊: PHYSICAL REVIEW LETTERS
• 影响因子: 8.6
• 作者: Luo, Meng-Bo;Hu, Xiao
• 通讯作者: Hu, Xiao

反強磁性体の磁化過程の位相幾何学的理論

反铁磁体磁化过程的拓扑理论

• 发表时间: 2008
• 作者: M.Hase;M.Kohno;H.Kitazawa;N.Tsujii;O.Suzuki;K.Ozawa;G.Kido;M.Imai;X.Hu;河野昌仙;M. Kohno;河野 昌仙;河野昌仙;M. Kohno;田中秋広
• 通讯作者: 田中秋広

Energy landscape of interlayer Josephson vortex systems based on the Lawrence-Doniach model

基于Lawrence-Doniach模型的层间约瑟夫森涡旋系统能量图

• 发表时间: 2007
• 期刊: Physica C 460-462
• 作者: S. -Z. Lin;X. Hu;M. Tachiki;M.-B.Luo and X.Hu;M.Kohno and X.Hu;A.Tanaka and X.Hu;Y.Nonomura and X.Hu
• 通讯作者: Y.Nonomura and X.Hu

Magnetic Properties of Low-Dimensional Quantum Spin System Cu_2CdB_2O_6

低维量子自旋体系Cu_2CdB_2O_6的磁性能

• 发表时间: 2006
• 期刊: AIP Conf.Proc. 850
• 作者: M.Hase,M.Kohno,H.Kitazawa,O.Suzuki,K.Ozawa,G.Kido,M.Imai;and X.Hu
• 通讯作者: and X.Hu

Revisit of magnetization process in antiferromagnets : topological approach

重新审视反铁磁体的磁化过程：拓扑方法

• 发表时间: 2007
• 作者: A. Tanaka;X. Hu;田中秋広;A. Tanaka
• 通讯作者: A. Tanaka