Anisotropic Transport Phenomena in Quasi-One-Dimensional ZrTe₃ Nanoribbons

Transition metal trichalcogenides with quasi-one-dimensional (quasi-1D) structures have attracted wide interest in various fields due to their unique electronic properties. In this study, we report strong in-plane anisotropic transport phenomena originating from the quasi-1D structure of ZrTe₃ nanoribbons. ZrTe₃ nanoribbons were mechanically exfoliated from bulk single crystals. The transport properties including electrical conductivity and Seebeck coefficient were measured along the longitudinal and transverse directions of the rectangular nanoribbons. Electrical conductivity was higher in the transverse direction than that in the longitudinal direction. Seebeck coefficient measurement revealed further clear anisotropic characteristics, and positive and negative S values were obtained in the longitudinal and transverse directions, respectively. Furthermore, a significant change in the transport properties was observed with a post treatment, and the potential of ZrTe₃ for transport property modulation was confirmed. We believe that our findings will contribute to the understanding of anisotropic transport in quasi-1D ZrTe₃ and expansion of the application fields of quasi-1D ZrTe₃.