STM-fabricated Magnets and their Role in Semiconductor Electronics

STM 制造的磁体及其在半导体电子中的作用

• 批准号: 9527553
• 负责人: David Awschalom
• 金额: $ 13.5万
• 依托单位: University of California-Santa Barbara
• 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=9527553&HistoricalAwards=false
• 关键词: STM; fabricated; Magnets; their; Role

9527553 Awschalom 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 transport, 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. ***

9527553 Awschalom这个 跨学科，两个校园项目雇用 光学科学和凝聚态物理学领域的尖端技术。 超高真空扫描隧道显微镜将用于直接在III-V半导体衬底和器件上合成单个和阵列的磁性结构。将使用微观霍尔棒磁力计，Aharonov-Bohm环，弹道传输和高灵敏度机械扭矩测量来检查结构的固有磁行为。 磁铁的影响 颗粒 对 自旋相关电子 状态 将通过飞秒分辨的法拉第和发光光谱仪来研究半导体中的电子。特别是，后者的研究包括空间分辨光学显微镜。 %这个 实验和理论项目采用 原子尺度光刻、低维电子输运和低温超快磁光光谱， 研究量子磁结构。这项工作的一个独特方面是原位制造直径只有几十个原子的“纳米磁体”，将研究其光学和磁性。这项工作包括半导体物理学、光学和磁学。学生在光学科学和工程领域获得的培训将为他们提供广泛的职业机会。 述纳米尺寸 磁 半导体展示 小说 磁光现象，目前还没有完全理解，但认为有很大的潜力作为可能的设备结构。 ***