STM-Fabricated Magnets and their Influence on Semiconductor Electronics

STM 制造的磁体及其对半导体电子的影响

• 批准号: 9510518
• 负责人: Stephan von Molnar
• 金额: $ 13.5万
• 依托单位: Florida State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-08-01 至 1998-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9510518&HistoricalAwards=false
• 关键词: STM; Fabricated; Magnets; their; Influence

9510518 von Molnar This interdisciplinary, two-campus project employs cutting-edge techniques from the fields of optical science and condensed matter physics. An ultra-high-vacuum scanning tunneling microscope will be used to synthesize both individual and arrays of magnetic structures directly on III-V semiconductor substrates and devices. The intrinsic magnetic behavior of the structures will be examined using microscopic Hall bar magnetometers, Aharonov-Bohm rings, ballistic transport, and high-sensitivity mechanical torque measurements. The influence of magnet particles on the spin-dependent electronic state in semiconductors will be investigated through femto-second-resolved Faraday and luminescence spectroscopes. In particular, the latter studies include spatially-resolved optical microscopy. %%% This experimental and theoretical project employs atomic-scale lithography, low-dimensional electronic transpopt, and ultra-fast magnetooptical spectroscopies at low temperature to investigate quantum magnetic structures. A unique aspect of the work is the in situ fabrication of "nanomagnets" only a few dozen atoms in diameter, whose optical and magnetic properties will be investigated. The work encompasses semiconductor physics, optics, and magnetism. The training gained by students in the areas of optical science and engineering will prepare them for a wide spectrum of career opportunities. The nanosize magnetic semiconductors exhibit novel magnetooptical phenomena that are currently incompletely understood, but which are felt to have great potential as possible device structures. ***

9510518 von Molnar这个跨学科的两校区项目采用了光学科学和冷凝物理学领域的尖端技术。 超高的vacuum扫描隧道显微镜将用于直接在IIII-V半导体底物和设备上合成单个和阵列的磁性结构。结构的固有磁性行为将使用微观霍尔杆磁力计，Aharonov-Bohm环，弹道传输和高敏感性机械扭矩测量进行检查。 磁体颗粒对半导体中自旋依赖性电子状态的影响将通过FEMTO秒秒的法拉第和发光光谱进行研究。特别是，后者的研究包括空间分辨的光学显微镜。 %% %%该实验和理论项目采用原子尺度光刻，低维电子传输和低温下的超快速磁磁光谱来研究量子磁结构。该工作的一个独特方面是原位制造“纳米磁体”，只有几十个直径的原子，其光学和磁性特性将被研究。这项工作包括半导体物理，光学和磁性。学生在光学科学和工程领域获得的培训将为他们提供各种职业机会做好准备。 纳米化磁性半导体表现出新型的磁场现象，这些现象目前尚不完全理解，但被认为具有巨大潜力作为设备结构。 ***