โ Scribed by Toru Matsuura; Taku Tsuneta; Katsuhiko Inagaki; Satoshi Tanda
No coin nor oath required. For personal study only.
We investigate the ac conductivity of charge density wave (CDW) rings, which are topologically different from whiskers. We synthesize ring crystals of NbSe 3 , a CDW material, by the selenium droplet spooling method. The ac conductivity is measured for both the rings and the whiskers in the frequency range of 10 kHz-150 MHz. We analyze the frequency dependence of the ac conductivity of the CDW rings and the whiskers using a simple washboard potential model. The result suggests that the CDW rings have a larger effective mass and a higher pinning frequency than the CDW in the whiskers and that the topology of the crystals plays an important role in CDW dynamics.
๐ SIMILAR VOLUMES
A metastable state is defined by the spatial phase configuration of a pinned charge-density wave (CDW) and can be changed by varying the field or the temperature. Normally one associates metastable states with hysteresis in the static properties of the CDW, however, in Ko.30MoO 3 at low temperature