Optical Spectroscopy of Electronic Matter Close to Quantum Criticality

接近量子临界点的电子物质的光谱学

基本信息

  • 批准号:
    0454540
  • 负责人:
  • 金额:
    $ 36万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    2005
  • 资助国家:
    美国
  • 起止时间:
    2005-06-01 至 2008-05-31
  • 项目状态:
    已结题

项目摘要

***NON-TECHNICAL***In the vast majority of metals and semiconductors, such as copper and silicon, the behavior of electrons is well understood and is described by theories developed decades ago. The same is true for electronic devices, such as the transistor, built using such materials. The focus of this individual investigator research will be on materials where a change of composition or magnetic field leads to so-called "quantum phase transitions" between metallic, semiconducting and superconducting behavior. In the vicinity of such transitions, and also in molecular wires where the current flows in one dimension, new electron states arise. In order to gain insight into these new electron states the frequency dependent electrical conductivity will be measured in the microwave and millimeter wave range of the optical spectrum. Electronic devices having potentially new principles of operation and characteristics will also be fabricated using the same materials. The research will involve graduate and undergraduate students, who will be trained in both electronics and optics techniques. ***TECHNICAL***This individual investigator research will focus on the behavior of electrons under circumstances where the change of composition or magnetic field leads to a quantum phase transition. The low energy electrodynamics of the disorder driven metal-insulator transition and the magnetic field driven superconductor-insulator transition will be investigated through the measurement of the low energy optical response in the dc to the millimeter wave spectral range. The frequency dependent optical conductivity will be evaluated and analyzed in terms of scaling relations. The unusual metallic state in molecular nanowires will be also investigated using the same experimental tools. Electronic devices will be fabricated using the same materials. A search for evidence of novel collective electron states will be undertaken through the examination of the device characteristics. Both graduate and undergraduate students will be involved in research and technique development in the spectral range of electromagnetic spectrum that has significant application potential.
*** 非技术性 *** 在绝大多数金属和半导体中,如铜和硅,电子的行为是很好理解的,并由几十年前发展的理论描述。同样的道理也适用于使用这种材料制造的电子设备,如晶体管。这项个人研究的重点将是材料的组成或磁场的变化导致所谓的“量子相变”之间的金属,半导体和超导行为。在这种跃迁的附近,以及电流在一维中流动的分子线中,新的电子态出现。为了深入了解这些新的电子状态,将在光谱的微波和毫米波范围内测量与频率相关的电导率。具有潜在的新的操作原理和特性的电子器件也将使用相同的材料制造。这项研究将涉及研究生和本科生,他们将接受电子和光学技术的培训。* 技术 * 这个个人研究者的研究将集中在组成或磁场的变化导致量子相变的情况下电子的行为。通过测量直流至毫米波波段的低能光学响应,研究无序驱动的金属-绝缘体转变和磁场驱动的超导-绝缘体转变的低能电动力学。频率依赖的光学电导率将被评估和分析的标度关系。分子纳米线中不寻常的金属状态也将使用相同的实验工具进行研究。电子设备将使用相同的材料制造。通过对器件特性的研究,将对新的集体电子态的证据进行搜索。研究生和本科生都将参与具有重大应用潜力的电磁频谱光谱范围的研究和技术开发。

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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George Gruner其他文献

Dispositifs electroniques actifs a composants composites nanofils
电子装置激活复合材料纳米纤维
  • DOI:
  • 发表时间:
    2004
  • 期刊:
  • 影响因子:
    0
  • 作者:
    George Gruner
  • 通讯作者:
    George Gruner

George Gruner的其他文献

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{{ truncateString('George Gruner', 18)}}的其他基金

NER: Fabrication of Electronic Devices with Nanotube Network Conducting Channels
NER:利用纳米管网络导电通道制造电子器件
  • 批准号:
    0404029
  • 财政年份:
    2004
  • 资助金额:
    $ 36万
  • 项目类别:
    Standard Grant
Electronic Detection of BioMolecules
生物分子的电子检测
  • 批准号:
    0415130
  • 财政年份:
    2004
  • 资助金额:
    $ 36万
  • 项目类别:
    Continuing Grant
Electrodynamics of Electron Liquids and Electron Glasses
电子液体和电子玻璃的电动力学
  • 批准号:
    0102405
  • 财政年份:
    2001
  • 资助金额:
    $ 36万
  • 项目类别:
    Continuing Grant
Investigation of Charge Transport Along the DNA Double Helix
沿 DNA 双螺旋的电荷传输研究
  • 批准号:
    0077251
  • 财政年份:
    2000
  • 资助金额:
    $ 36万
  • 项目类别:
    Standard Grant
Low Frequency Electrodynamics of Correlated Metals
相关金属的低频电动力学
  • 批准号:
    9801816
  • 财政年份:
    1998
  • 资助金额:
    $ 36万
  • 项目类别:
    Continuing Grant
Experiments on the Electrodynamics of Charged Quantum Liquids
带电量子液体的电动力学实验
  • 批准号:
    9503009
  • 财政年份:
    1995
  • 资助金额:
    $ 36万
  • 项目类别:
    Continuing Grant
US-Hungary Materials Research on Properties of Low Dimensional Solids
美国-匈牙利低维固体特性材料研究
  • 批准号:
    9322517
  • 财政年份:
    1994
  • 资助金额:
    $ 36万
  • 项目类别:
    Standard Grant
Acquisition of a Low Temperature and High Magnetic Field Optical Facility
购置低温高磁场光学设施
  • 批准号:
    9404319
  • 财政年份:
    1994
  • 资助金额:
    $ 36万
  • 项目类别:
    Standard Grant
Millimeter and Submillimeter Spectroscopy of Solids
固体的毫米波和亚毫米波谱
  • 批准号:
    9216500
  • 财政年份:
    1993
  • 资助金额:
    $ 36万
  • 项目类别:
    Standard Grant
An Experimental Investigation of Charge and Spin Density Waves
电荷和自旋密度波的实验研究
  • 批准号:
    9218745
  • 财政年份:
    1993
  • 资助金额:
    $ 36万
  • 项目类别:
    Continuing Grant

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过渡金属化合物的详细光谱:发现和调整电子结构和光学性质
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