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

9705513 Beauchamp这是一项研究计划补助金，用于研究玻色玻璃。玻色玻璃是一种在无序柱状缺陷晶格中局域化的超导涡旋系统，用与库仑玻璃相同的哈密顿量来描述，库仑玻璃是一种在掺杂中局域化载流子系统。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，无序性可以通过电子束光刻技术在超导体薄膜中制造柱状缺陷来控制，而粒子相互作用可以通过简单地改变外加磁场来控制。利用该玻色玻璃系统模型，本研究旨在阐明粒子相互作用和无序的独立变化对粒子静态构型和动态运动的影响。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，因此本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，本研究结果将加深我们对重离子轰击产生无序柱状缺陷晶格的高温超导体涡旋钉钉的理解。尽管物理学家已经成功地对许多材料的电子和磁性有了详细的了解，但一些材料中的无序性和强粒子间相互作用阻碍了这种详细的了解。目前的研究将集中在具有故意制造缺陷的超导薄膜中称为涡流的磁通管系统中的无序和粒子间相互作用的作用。缺陷的产生和控制将使用电子束光刻技术，旋涡相互作用将通过改变外加磁场来控制。将测量无序和粒子间相互作用对涡旋结构和涡旋运动的影响。由于这种对无序和相互作用的控制在其他无序的相互作用系统中是不可能的，因此本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，本研究结果将加深我们对高温超导体涡旋运动的认识。这是一项研究计划拨款。＊＊＊

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. ***