Experimental Study of the Magnetic Flux Line Lattice in Superconductors
超导体磁通线晶格的实验研究
基本信息
- 批准号:9705389
- 负责人:
- 金额:$ 28万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:1997
- 资助国家:美国
- 起止时间:1997-09-01 至 2001-08-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
w:\awards\awards96\num.doc 9705389 Andrei This experimental research project focuses the interactions between quantized magnetic flux lines threading through a Type II superconductor. An ordered state of interacting flux lines, as theoretically predicted by Abrikosov, provides the conceptual basis of the experimental work. The influences of material disorder, thermal fluctuations, and the quantum nature of the flux line formation lead to an extremely complicated picture in the area of parameters where the Abrikosov lattice becomes unstable. There are questions relating to a glassy phase of the flux array, among others, which are addressed in this experimental project. The work on 2H-NbSe2 identified two states of the flux line lattice characterized by dramatically different dynamics, one being disordered and have pinning frequencies two orders of magnitude higher than the ordered lattice, and accompanied by much higher critical currents. In this project local magnetization measurements will be made using an array of microscopic Hall sensors realized in the 2-D electron gas at the interface of a GaAs/GaAlAs heterostructure. Other work includes DC and AC measurements of the shear modulus of the flux array, and measurements of transverse currents in dynamic fluxon states. Portions of the work will be done in collaboration with Dr. Eli Zeldov of the Weizmann Institute. %%% This experimental research project, is focused on the behavior of Type II superconductors in a magnetic field. In this case the magnetic field can penetrate the superconductor, in an array of quantized flux lines. Under ideal conditions these lines, each carrying one quantum of magnetic flux, arrange in an ordered array or flux lattice, as predicted theoretically by Abrikosov. This experimental project is devoted to measurement of the motions and arrangements o f the flux lines in less than ideal conditions when the flux lines may be in a disordered state or in a state of motion somewhat like a liquid. The results of this research may provide information of importance to the application of Type II superconductors including high temperature cuprate superconductors in improved electrical and electromechanical technology. This research project is interdisciplinary in nature and involves graduate students who will be excellently trained to enter positions in industry, government or education. ***
这个实验研究项目主要关注穿过第二类超导体的量子化磁通线之间的相互作用。Abrikosov理论上预言的相互作用磁通线的有序状态为实验工作提供了概念基础。材料无序、热涨落和磁通线形成的量子性质的影响导致了Abrikosov晶格变得不稳定的参数区域的极其复杂的图景。在这个实验项目中,有一些与熔剂阵列的玻璃相有关的问题,以及其他问题。对2H-NbSe2的研究发现了磁通线晶格的两种状态,一种是无序的,钉扎频率比有序晶格高两个数量级,并伴随着更高的临界电流。在这个项目中,我们将使用一组在二维电子气中实现的微型霍尔传感器阵列,在GaAs/GaAlAs异质结界面上进行局部磁化测量。其他工作包括直流和交流测量磁通阵列的剪切模数,以及测量动态磁通子状态下的横向电流。部分工作将与魏兹曼研究所的伊莱·泽尔多夫博士合作完成。这个实验研究项目主要研究第二类超导体在磁场中的行为。在这种情况下,磁场可以在量化的磁通线阵列中穿透超导体。在理想条件下,这些线,每条携带一量子磁通量,按照阿布里科索夫的理论预测,排列成有序的阵列或磁通格子。这个实验项目致力于测量非理想状态下的磁通线的运动和排列,当磁通线可能处于无序状态或有点像液体的运动状态时。这一研究结果可能为包括高温铜酸盐超导体在内的第二类超导体在改进的电气和机电技术中的应用提供重要的信息。这项研究项目本质上是跨学科的,涉及将接受良好培训以进入工业、政府或教育职位的研究生。***
项目成果
期刊论文数量(0)
专著数量(0)
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会议论文数量(0)
专利数量(0)
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Eva Andrei其他文献
Eva Andrei的其他文献
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{{ truncateString('Eva Andrei', 18)}}的其他基金
Strain Engineering of Band Structure and Electronic Properties in Two Dimensional Materials.
二维材料能带结构和电子特性的应变工程。
- 批准号:
1708158 - 财政年份:2017
- 资助金额:
$ 28万 - 项目类别:
Standard Grant
MRI: Development of an Ultra-High Vacuum Cryogen-free Low Temperature Proximal Probe System for the Exploration of Low Dimensional Materials and Nano-devices
MRI:开发超高真空无冷冻剂低温近端探针系统,用于探索低维材料和纳米器件
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1337871 - 财政年份:2013
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$ 28万 - 项目类别:
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2012 Correlated Electron Systems GRC and GRS; Mount Holyoke College; South Hadley, MA; June 23-29, 2012
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1162016 - 财政年份:2012
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二维电子系统的电子特性:探索维度边界和界面的作用。
- 批准号:
1207108 - 财政年份:2012
- 资助金额:
$ 28万 - 项目类别:
Continuing Grant
Experimental Studies of Graphene Layers
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- 批准号:
0906711 - 财政年份:2009
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$ 28万 - 项目类别:
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Experiments on Time-Resolved Transport and Imaging of Moving Vortex Matter
运动涡旋物质的时间分辨输运与成像实验
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0456473 - 财政年份:2005
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$ 28万 - 项目类别:
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Dynamic Transitions in Magnetic Vortex Lattices
磁涡晶格中的动态转变
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0102692 - 财政年份:2001
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$ 28万 - 项目类别:
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Experimental Study of Two Dimensional Electron Layers
二维电子层的实验研究
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$ 28万 - 项目类别:
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ROW: Experimental Study on the Finite-Frequency Response of the High Temperature Superconductors
ROW:高温超导体有限频率响应的实验研究
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9306951 - 财政年份:1993
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$ 28万 - 项目类别:
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Experiments on a Two Dimensional Quantum Wigner Crystal
二维量子维格纳晶体的实验
- 批准号:
9218501 - 财政年份:1992
- 资助金额:
$ 28万 - 项目类别:
Standard Grant
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