Thickness-Dependent In-Plane Thermal Conductivity and Enhanced Thermoelectric Performance in p-Type ZrTe 5 Nanoribbons

Jie Guo, Yuan Huang, Xiangshui Wu, Qilang Wang, Xingjiang Zhou, Xiangfan Xu*, Baowen Li

*Corresponding author for this work

Research output: Contribution to journalLetterpeer-review

25 Citations (Scopus)

Abstract

Topological materials attract enormous attention due to their unique physical properties and thermoelectric applications. ZrTe 5 , a semimetal material, is proposed to be a new topological material and shows interesting thickness-dependent electrical transport properties. Here, the in-plane thermal conductivity and power factor in exfoliated few-layer ZrTe 5 nanoribbons with different thickness measured using suspended thermal bridge method are reported. A nearly linearly thickness-dependent thermal conductivity κ is observed where thicker nanoribbons present higher thermal conductivity in the temperature range of 100–300 K due to phonon-boundary scattering. More interestingly, the room temperature figure of merit ZT of 140 nm-thick ZrTe 5 nanoribbon is five times higher than that in bulk ZrTe 5 , providing superior thermoelectric performance in thinner ZrTe 5 nanoribbons and revealing the promising prospect of ZrTe 5 nanoribbons as thermoelectric materials.

Original languageEnglish
Article number1800529
JournalPhysica Status Solidi - Rapid Research Letters
Volume13
Issue number3
DOIs
Publication statusPublished - Mar 2019
Externally publishedYes

Keywords

  • ZrTe nanoribbons
  • boundary-phonon scattering
  • figure of merit
  • thickness-dependent thermal conductivity

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