Scanning Tunneling Microscopy and Ultralow Temperature Transport Measurements on Quench Condensed Films

淬火凝聚膜的扫描隧道显微镜和超低温传输测量

基本信息

  • 批准号:
    9502920
  • 负责人:
  • 金额:
    $ 27.5万
  • 依托单位:
  • 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:
    1995-07-15 至 1999-02-28
  • 项目状态:
    已结题

项目摘要

9502920 Valles This experimental project involves low temperature scanning tunneling microscopy and electron magneto-transport and tunneling measurements on strongly disordered ultrathin films. The experiments will investigate the physical effects behind the profound and sometimes spectacular changes (e.g.,the superconductor to insulator transition) that occur in electronic systems in the strongly disordered limit in two dimensions. The ultra-thin metal films are fabricated in situ by thermal evaporation of the constituent metals onto substrates held at temperatures near 4 K. Experiments with the scanning tunneling microscope will measure the atomic surface structure as well as variations in their local tunneling density of states. The experiments are of interest from fundamental viewpoints, as well as technical viewpoints, as the results will increase our understanding of electronic conduction processes in metals. %%% This experimental project involves low temperature scanning tunneling microscopy and electron magneto-transport and tunneling measurements on strongly disordered ultrathin films. The experiments will investigate the physical effects behind the profound and sometimes spectacular changes (e.g., the superconductor to insulator transition) that occur in electronic systems in the strongly disordered limit in two dimensions. The ultra-thin metal films are fabricated in situ by thermal evaporation of the constituent metals onto substrates held at temperatures near 4 K. Experiments with the scanning tunneling microscope will measure the atomic surface structure as well as variations in their local tunneling density of states. The experiments are of interest from fundamental viewpoints, as well as technical viewpoints, as the results will increase our understanding of electronic conduction processes in metals. ***
小行星9502920 这个实验项目涉及低温扫描隧道显微镜和电子磁输运和隧道测量强烈无序双金属薄膜。 这些实验将研究深刻的,有时是壮观的变化背后的物理效应(例如,超导体到绝缘体的转变),其发生在二维中的强无序极限中的电子系统中。 超薄金属膜是通过将组分金属热蒸发到保持在接近4K的温度下的衬底上原位制备的。扫描隧道显微镜的实验将测量原子表面结构以及它们的局域隧道态密度的变化。 这些实验从基本观点和技术观点来看都很有趣,因为结果将增加我们对金属中电子传导过程的理解。 这个实验项目包括低温扫描隧道显微镜和电子磁输运和隧道测量强烈无序的双金属薄膜。 这些实验将研究深刻的,有时是壮观的变化背后的物理效应(例如,超导体到绝缘体的转变),其发生在二维中的强无序极限中的电子系统中。 超薄金属膜是通过将组分金属热蒸发到保持在接近4K的温度下的衬底上原位制备的。扫描隧道显微镜的实验将测量原子表面结构以及它们的局域隧道态密度的变化。 这些实验从基本观点和技术观点来看都很有趣,因为结果将增加我们对金属中电子传导过程的理解。 ***

项目成果

期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)

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James Valles其他文献

Pattern Blocks, Area, and Content Acquisition
模式块、区域和内容获取
  • DOI:
  • 发表时间:
    2018
  • 期刊:
  • 影响因子:
    0
  • 作者:
    James Valles;Rebecca R. Ortiz
  • 通讯作者:
    Rebecca R. Ortiz

James Valles的其他文献

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{{ truncateString('James Valles', 18)}}的其他基金

Experimental Investigations of an Inhomogeneous Electronic Phase of Matter, the Cooper Pair Insulator
物质非均匀电子相(库珀对绝缘体)的实验研究
  • 批准号:
    1307290
  • 财政年份:
    2013
  • 资助金额:
    $ 27.5万
  • 项目类别:
    Continuing Grant
Probing Cooper Pair Insulator to Superconductor Transitions in Amorphous Films
探测非晶薄膜中库珀对绝缘体到超导体的转变
  • 批准号:
    0907357
  • 财政年份:
    2009
  • 资助金额:
    $ 27.5万
  • 项目类别:
    Continuing Grant
STUDIES OF THE FORCE SENSITIVITY OF INDIVIDUAL SWIMMING PROTISTS USING MAGNETIC FORCE BUOYANCY VARIATION
利用磁力浮力变化研究游泳原生生物个体的力敏感性
  • 批准号:
    0750360
  • 财政年份:
    2008
  • 资助金额:
    $ 27.5万
  • 项目类别:
    Continuing Grant
Vorticles and Quasiparticles in Superconducting Films in the Small Order Parameter Amplitude Limit
小阶参数振幅极限下超导薄膜中的涡旋和准粒子
  • 批准号:
    0605797
  • 财政年份:
    2006
  • 资助金额:
    $ 27.5万
  • 项目类别:
    Continuing Grant
Quantum Phase Transitions in Nanostructured Superconductors in 2D
二维纳米结构超导体中的量子相变
  • 批准号:
    0203608
  • 财政年份:
    2002
  • 资助金额:
    $ 27.5万
  • 项目类别:
    Continuing Grant
Manipulation of Cell Division with Static Magnetic Fields
用静磁场操纵细胞分裂
  • 批准号:
    9816986
  • 财政年份:
    1999
  • 资助金额:
    $ 27.5万
  • 项目类别:
    Standard Grant
Tunneling and Transport Studies of Strongly Disordered Ultra-Thin Films of Metals and Superconductors
金属和超导体强无序超薄膜的隧道和输运研究
  • 批准号:
    9801983
  • 财政年份:
    1998
  • 资助金额:
    $ 27.5万
  • 项目类别:
    Continuing Grant
Electron Tunneling Studies of Ultrathin Normal Metal Films
超薄普通金属薄膜的电子隧道研究
  • 批准号:
    9122268
  • 财政年份:
    1992
  • 资助金额:
    $ 27.5万
  • 项目类别:
    Continuing Grant
Electron Tunneling Studies of Ultrathin Normal Metal Films
超薄普通金属薄膜的电子隧道研究
  • 批准号:
    9296192
  • 财政年份:
    1992
  • 资助金额:
    $ 27.5万
  • 项目类别:
    Continuing Grant

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Design and Implementation of Hyperdimensional Scanning Tunneling Microscopy
超维扫描隧道显微镜的设计与实现
  • 批准号:
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  • 财政年份:
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