Metallic Transport in Chemical Vapor Deposition ZrTe₃ Nanoribbons on a SiO₂ Wafer Substrate

Abstract

We report on the chemical vapor deposition (CVD) growth of quasi-one-dimensional zirconium tritelluride (ZrTe 3 ) at temperatures below 600 °C and process times under an hour, which results in a material on a SiO 2 /Si wafer substrate that offers electrical conductivity comparable to the bulk. This study combines tailored CVD processing using a tube-in-a-tube technique with characterization by optical microscopy, Raman spectroscopy, and scanning electron microscopy. Transmission electron microscopy validates the composition and offers atomic contrast. Electrical transport measurements employ an yttriumgold stack to achieve good adhesion and low contact resistance. A positive temperature coefficient is observed, as expected for a metallic material. The obtained results are important for the proposed applications of quasi-one-dimensional van der Waals materials in the next-generation electronic devices.

Layer-Structured Anisotropic Metal Chalcogenides: Recent Advances in Synthesis, Modulation, and Applications

“…Copyright 2018 American Chemical Society. (g) Reprinted with permission from ref . Copyright 2021 American Chemical Society.…”

“…The vertical rods shown in the middle figure indicate the direction of high conductivity; these colored rods extend along the b -axis and create the quasi-1D wires. They assemble in sheets, which in turn stack to make up the bulk . The ternary chalcogenides such as MAX 3 (e.g., CrSbSe 3 ), M 2 AX 5 (e.g., Nb 2 PdS 5 ), and M 2 A 3 X 8 (M = Ta, Nb, A = Ni, Pd, Pt, X = S, Se) also have a linear crystal structure. , For instance, CrSbSe 3 crystallizes in the orthorhombic phase, where the Sb atoms occupying the edge of the double-rutile chains bind to three Se atoms in the trigonal pyramidal geometry (Figure h).…”

“…The 1D structure generally consists of an elongated chalcogen shell with a metal core . The well-known NWs, NRBs, and NBs of TMTC compounds are TiS 3 , − NbSe 3 , − TaSe 3 , TaTe 3 , HfTe 3 , , ZrTe 3 , , and others . Apart from the TMTCs, many M–X combinations have also been achieved in the NW form, including MX (e.g., MoTe, WTe) and M 6 X 6 (e.g., Mo 6 S 6 , − Mo 6 Se 6 , Mo 6 Te 6 , W 6 Te 6 ), mono and multi MC alloys (e.g., MoS x Se 1– x , Mo x W 1– x S, AgSeTe, and CoSeTe), chalcogenide-cluster-based semiconducting NTs, and hybrid metal organic chalcogenides .…”