NbS$_{3}$: A unique quasi one-dimensional conductor with three charge   density wave transitions
  Through transport, compositional and structural studies, we review the features of the charge-density wave (CDW) conductor of NbS$_{3}$ (phase II). We highlight three central results: 1) In addition to the previously reported CDW transitions at $T_{P1}$ = 360\,K and $T_{P2}$ = 150\,K, another CDW transition occurs at a much higher temperature $T_{P0}$ = 620-650\,K; evidence for the non-linear conductivity of this CDW is presented. 2) We show that CDW associated with the $T_{P2}$ - transition arises from S vacancies acting as donors. Such a CDW transition has not been observed before. 3) We show exceptional coherence of the $T_{P1}$-CDW at room-temperature. Additionally, we report on the effects of uniaxial strain on the CDW transition temperatures and transport. 
S.G. Zybtsev, V.Ya. Pokrovskii, V.F. Nasretdinova, S.V. Zaitsev-Zotov,   V.V. Pavlovskiy, A.B. Odobesco, Woei Wu Pai, M.-W. ...
cond-mat.str-el