Distinctive features of the charge density wave collective motion driven by Hall electric field in NbSe3статья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 30 июня 2021 г.
Аннотация:We present a comparative study of the charge density wave (CDW) sliding at low temperatures in NbSe3 between two configurations: theconventional one with the current applied along the chain axis and that, the CDW being driven by the Hall electric field, with the currentapplied along micrometer-sized bridge-type structures cut perpendicular to the chain axis. In this Hall bar configuration, nonlinear propertiescan be easily extended to much lower temperatures. The threshold electric field, Et, for CDW depinning is very sharp and has been measureddown to 0.1 mK. It is found that Et becomes temperature independent below T 4:2 K, which suggests a crossover from thermalfluctuations to a tunneling mechanism for CDW depinning.