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Thickness‐Dependent In‐Plane Thermal Conductivity and Enhanced Thermoelectric Performance in p‐Type ZrTe 5 Nanoribbons
Author(s) -
Guo Jie,
Huang Yuan,
Wu Xiangshui,
Wang Qilang,
Zhou Xingjiang,
Xu Xiangfan,
Li Baowen
Publication year - 2019
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201800529
Subject(s) - thermal conductivity , thermoelectric effect , materials science , condensed matter physics , phonon scattering , thermoelectric materials , scattering , figure of merit , atmospheric temperature range , phonon , topological insulator , thermal , optoelectronics , engineering physics , composite material , optics , physics , thermodynamics
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.