An Experimental Investigation of Charge and Spin Density Waves

本研究涉及各种实验，从而获得电荷密度波（CDW）和自旋密度波（SDW）基态的动力学信息。CDW和SDW凝聚体的集体模式交流响应将在无线电、微、毫米和红外光谱范围内进行研究，并将探索基态的非线性激发。这些实验将导致关于集体模式和单粒子激励之间相互作用的信息，包括有关凝聚物内部模式动力学的问题。实验还将在直流和交流场的联合应用下进行，试图探索在各种破对称基态中低温下可能出现的量子现象的可能性。实验将在各种无机和有机线性链化合物上进行。这项研究涉及研究固体中各种新型有序电子态的行为，称为电荷密度波和自旋密度波态。电导率将作为频率和外加电场的函数来研究。目的是研究由这些电子态的集体运动引起的新型非线性输运现象。由于异常响应，这些材料也可以作为新的探测器和发生器，这些方面的领域也将进行研究。实验将在发展这种状态的各种有机和无机材料中进行。

This research involves various experiments which lead to information concerning the dynamics of charge density wave (CDW) and spin density wave (SDW) ground states. The collective mode ac response of CDW and SDW condensates will be investigated in the radio, micro, millimeter and infrared spectral range, and will emcompass a search for nonlinear excitations of the ground states. These experiments will lead to information on the interplay between collective mode and single particle excitations, including questions concerning the dynamics of internal modes of the condensates. Experiments will also be conducted under the joint application of dc and ac fields, in an attempt at exploring the possibility of quantum phenomena which may arise at low temperatures in the various broken symmetry ground states. The experiments will be conducted on various inorganic and organic linear chain compounds. %%% This research involves the study of the behavior of various types of new, ordered electron states of solids, called the charge density wave and spin density wave states. The electrical conductivity will be investigated as the function of frequency and of applied electric fields. The objective is to examine the new type of nonlinear transport phenomena which are due to the collective motion of these electron states. Because of anomalous response, these materials may also serve as novel detectors and generators, and these aspects of the field will also be examined. The experiments will be conducted in various organic and inorganic materials where such states develop.