Optical investigation of the origin of switching conduction in charge-density waves
Optical investigation of the origin of switching conduction in charge-density waves
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DOI：
10.1103/physrevb.70.075111
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发表时间：
2004-08
影响因子：
3.7
通讯作者：
N. Ogawa;K. Miyano
中科院分区：
文献类型：
--
作者：
N. Ogawa;K. Miyano
利用相位应变的光学调制，研究了In中滑动电荷密度波(CDW)的低温动力学特性。发现了开关跃迁、尺寸效应和光效应之间的密切关系，并根据CDW的塑性基态进行了讨论。还观察到了阈值电压的大幅度变化和明显的导通延迟，并通过光激发对其进行了控制。光激发在塑性状态下更为有效，并证实了这种转换是通过刚性但脆性的CDW的非均匀断裂相变发生的。
Low-temperature dynamical properties of the sliding charge-density wave (CDW) inwas investigated using the optical modulation of the phase strain. An intimate relation between switching transition, size effects, and photoeffects was found, and discussed in terms of the plastic ground state of the CDW. Large evolution of the sliding threshold voltage and clear conduction delay were also observed, and manipulated through photoexcitation. Optical excitation is more effective in the plastic state, and it is confirmed that the switching occurs through the inhomogeneous breaking transition of the rigid but fragile CDW.