Electric-Field Dependent Conduction by Sliding Charge-Density Waves in Transition-Metal Trichalcogenides
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概要
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Detailed measurements of electric-field-dependent conductivity by the slidingcharge-density wave (CDW) were performed in NbSe. with various impurity concen-tration and also in two polytypes of TaS.. Results were analyzed in terms of variousmodels proposed so far. As a result, they were found to be well understood by the so-called Fukuyama-Lee-Rice model based on the semiclassical treatment of the phase ofthe CDW. If the depinning is interpreted as a dynamical critical phenomenon, thecritical exponent was found to be 2. The analysis of temperature dependence of thethreshold field clearly shows that the thermal fluctuation affects the temperaturedependence of the threshold field in case of weak pinning, and that the thermallyassisted hopping is the dominant origin of the temperature dependence of thethreshold electric field in case of the strong pinning.
- 社団法人日本物理学会の論文
- 1990-01-15
著者
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Uchinokura Kunimitsu
Department Of Applied Physics The University Of Tokyo
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Uchinokura Kunimitsu
Department Of Advanced Materials Science The University Of Tokyo
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Maeda Atsutaka
Department Of Applied Physics The University Of Tokyo
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