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
- 来源:
- 关键词:
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*在铜和硅等绝大多数金属和半导体中,电子的行为被很好地理解,并由几十年前开发的理论来描述。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放在材料上,即成分或磁场的变化会导致金属、半导体和超导行为之间的所谓“量子相变”。在这种跃迁附近,以及在电流沿一维流动的分子导线中,新的电子态出现。为了深入了解这些新的电子态,我们将在微波和毫米波光谱范围内测量随频率变化的电导率。具有潜在新的工作原理和特性的电子设备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方面的培训。*技术*这项单独的研究人员将专注于电子在成分或磁场变化导致量子相变的情况下的行为。通过测量直流对毫米波的低能光学响应,研究无序驱动的金属-绝缘体相变和磁场驱动的超导体-绝缘体相变的低能电动力学。我们将根据标度关系来评估和分析随频率变化的光学传导性。分子纳米线中的异常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。将通过对器件特性的检查来寻找新的集体电子态的证据。研究生和本科生都将参与电磁频谱领域的研究和技术开发,该领域具有重要的应用潜力。
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
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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