Development of a Low Temperature, High-field, Ultra-high Vacuum Scanning Tunneling Microscope

低温、高场、超高真空扫描隧道显微镜的研制

• 批准号: 9501156
• 负责人: Alex Zettl
• 金额: $ 58万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-08-01 至 1998-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9501156&HistoricalAwards=false
• 关键词: Development; Low; Temperature; field; Ultra

9501156 Zettl The invention of the scanning tunneling microscope (STM) has had tremendous impact on condensed matter physics and other disciplines. Although the STM was used originally only as a high-resolution, low-speed electronic imaging device, recent generation STM's have seen a wider variety of applications, including the picosecond resolution of tunneling and excitation processes and the control of nonlinear optical processes such as frequency mixing and harmonic generation. One long-time goal has been the ability to use the STM to construct and characterize new nanoscale structures, formed atom-by-atom or molecule-by-molecule. Although elusive, this capability promises the investigation of quantum size effects, atomic interactions, and novel electronic circuit elements. This award will find the construction of the next-generation STM, designed specifically to assemble and characterize nanoscale structures with unusual electronic properties. This machine will uniquely combine materials synthesis, manipulation, and high-resolution characterization capabilities, including operation at low temperature in ultrahigh vacuum (UHV) under high magnetic field, with atomic resolution and with unsurpassed high-speed data processing. Several outstanding problems in condensed matter physics necessitate such a machine and provide the initial motivation for its construction: (1) studies of metallic and superconducting clusters; (2) spectroscopy of one-and two-dimensional materials; and (3) fabrication of networks and quantum confined structures. ***

9501156 Zettl扫描隧道显微镜（STM）的发明对凝聚态物理和其他学科产生了巨大的影响。 虽然STM最初仅用作高分辨率、低速的电子成像设备，但最近一代STM已经看到了更广泛的应用，包括隧道和激发过程的皮秒分辨率以及非线性光学过程的控制，例如混频和谐波产生。 一个长期的目标是能够使用STM构建和表征新的纳米级结构，形成原子与原子或分子与分子。 虽然难以捉摸，但这种能力有望研究量子尺寸效应，原子相互作用和新颖的电子电路元件。 该奖项将发现下一代STM的建设，专门设计用于组装和表征具有不寻常的电子特性的纳米结构。 这台机器将独特地结合联合收割机材料合成，操作和高分辨率表征能力，包括在高磁场下的超真空（UHV）中的低温操作，原子分辨率和无与伦比的高速数据处理。凝聚态物理学中的几个突出问题需要这样一台机器，并为其建造提供了最初的动机：（1）金属和超导团簇的研究;（2）一维和二维材料的光谱学;（3）网络和量子限制结构的制造。 ***