Frequency-dependent conductivity of charge ordering phases in two-dimensional organic metals: search for the anisotropic dispersion and collective excitations
Frequency-dependent conductivity of charge ordering phases in two-dimensional organic metals: search for the anisotropic dispersion and collective excitations
批准号:
54227208
负责人:
Professor Dr. Martin Dressel
金额:
$0.0万
依托单位国家:
德国
项目类别:
Research Grants
财政年份:
2008
资助国家:
德国
项目状态:
已结题
起止时间:
2007-12-31 至 2009-12-31
中文摘要
本研究计划的目的是促进对二维有机导体中电荷有序电子相稳定的理解。特别地,我们将寻找这些电荷有序态的集体激发:直流电场非线性效应,低频损耗峰和钉扎电荷模式共振。在实验上,我们将进行频率,电场和温度依赖电导率的研究,在dc-MHz范围内,并在光波范围(亚毫米,毫米和红外光谱范围)的电场沿着主要结晶方向。这些实验将通过电荷有序相变的电磁性性质的研究来扩展。
英文摘要
The aim of this research program is to advance the understanding of charge-ordered electronic phases stabilized in two-dimensional organic conductors. In particular, we will look for the collective excitations of these charge-ordered states: the dc electricfield nonlinear effects, the low-frequency loss peak and the pinned charge-mode resonance. Experimentally, we will perform studies of frequency, electric field and temperature dependent conductivity in the dc-MHz range and in the optical wave range (submillimeter, millimeter and infrared spectral range) for electric fields along the main crystallographic directions. These experiments will be extended by investigations of galvanornagnetic properties of the charge ordering phase transition.
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