Correlations, Disorder, and the Anderson-Mott Transition in the Bose Glass

Bose 玻璃中的相关性、无序性和安德森-莫特转变

• 批准号: 9705513
• 负责人: Kara Beauchamp
• 金额: $ 1.5万
• 依托单位: Wesleyan University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-05-01 至 1998-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9705513&HistoricalAwards=false
• 关键词: Correlations; Disorder; Anderson; Mott; Transition

9705513 Beauchamp This is a Research Planning Grant for a new female faculty to study the Bose glass. The Bose glass is a system of superconducting vortices localized in a disordered columnar defect lattice, is described by the same Hamiltonian as the Coulomb glass, a system of localized charge carriers in a doped. The ground state of these systems, which determines whether they are conducting or insulating, depends in a complicated manner on the relative strengths of the particle- particle and particle-potential interactions. In the Bose glass, disorder can be controlled by creating the columnar defects in thin superconducting films using electron-beam lithography, and particle interactions can be controlled simply by changing the applied magnetic field. Using this model Bose glass system, this proposed research aims to elucidate the effects of independent variation of particle interactions and disorder on both the static configuration and the dynamic motion of the particles. Since such control over disorder and interaction is not possible in the Coulomb glass, the results of this research will provide valuable feedback for the theoretical understanding of these systems. Furthermore, the results of this research will deepen our understanding of vortex pinning in those high temperature superconductors that have disordered columnar defect lattices produced by heavy-ion bombardment. %%% Although physicists have been successful in developing a detailed understanding of electronic and magnetic properties of a wide range of materials, disorder and strong interparticle interactions in some materials has encumbered such a detailed understanding. The present research will focus on the role of disorder and interparticle interactions in a system of magnetic flux tubes, called vortices, in superconducting thin films with intentionally fabricated defects. The defects will be created and controlled using electron-beam lithography, and vortex interactions will be controlled simply by changing the applied magnetic field. The effects of disorder and interparticle interactions on the vortex configurations and vortex motion will be measured. Sincince such control over disorder and interactions is not possible in other disordered, interacting systems, the results of this research will provide valuable feedback for the theoretical understanding of these systems. Furthermore, the results of this research will deepen our understanding of vortex motion in high temperature superconductors. This a Research Planning Grant. ***

小行星9705513 这是一个研究规划补助金，为一个新的女教师研究玻色玻璃。 玻色玻璃是一种超导涡旋系统，它局域在无序的柱状缺陷晶格中，与库仑玻璃的哈密顿量相同，库仑玻璃是一种掺杂的局域电荷载流子系统。 这些系统的基态决定了它们是导电的还是绝缘的，它以一种复杂的方式取决于粒子-粒子和粒子-势相互作用的相对强度。 在玻色玻璃中，可以通过使用电子束光刻在薄超导膜中产生柱状缺陷来控制无序，并且可以简单地通过改变施加的磁场来控制粒子相互作用。 使用这个模型玻色玻璃系统，这项拟议的研究旨在阐明粒子的相互作用和无序的静态配置和动态运动的粒子的独立变化的影响。 由于这种对无序和相互作用的控制在库仑玻璃中是不可能的，因此这项研究的结果将为这些系统的理论理解提供有价值的反馈。 此外，本研究的结果将加深我们对高温超导体中涡旋钉扎现象的理解 它们扰乱了 柱状 重离子轰击产生的缺陷晶格。 虽然物理学家已经成功地发展了一个详细的了解电子和磁性的性质， 一 广泛的材料，无序和 某些材料中强的粒子间相互作用阻碍了对这种详细的理解。 本研究将重点 对 的 作用 的 障碍和 在具有故意制造的缺陷的超导薄膜中，磁通量管系统（称为涡流）中的粒子间相互作用。 的缺陷 将创建 并使用电子束光刻进行控制， 涡流相互作用将简单地通过改变所施加的磁场来控制。 无序的影响 并测量颗粒间相互作用对涡结构和涡运动的影响。 由于对混乱的这种控制 相互作用是不可能的 在 其他无序的、相互作用的系统， 的 这一研究将为这些系统的理论理解提供有价值的反馈。 此外，本研究的结果将加深我们对涡旋运动的理解， 高温超导体 这是一个研究规划补助金。 ***