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In quasi-one-dimensional (quasi-1D) system, the charge density wave (CDW)transition temperature TCDW is usually lower than the mean-field-theorypredicted TMF and a CDW fluctuation region exists between them. Here, weinvestigate the physical properties of PdTeI single crystal containing quasi-1DPdTe chains. Surprisingly, we find that the carrier concentration decreasesgradually before the long-range CDW ordering state occurring at T1 ~ 110 K,reflecting the existence of strong CDW fluctuation with possible pseudogapstate at T >> T1 because of dynamic charge separation of Pd ions (Pd3+ -> Pd2++ Pd4+). Moreover, the sliding CDW state appears below T2 ~ 6 K. Combined suchlow T2 with the feature of multiple quasi-1D bands, PdTeI exhibits exoticcrossover behavior from negative to huge positive magnetoresistance undermagnetic field and field-induced localization. Thus, PdTeI provides a novelplatform for studying the CDW fluctuation and the interplay between magneticfield and CDW state.

Strong charge density wave fluctuation and sliding state in PdTeI with quasi-1D PdTe chains