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 language | English |
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Article number | 1800529 |
Journal | Physica Status Solidi - Rapid Research Letters |
Volume | 13 |
Issue number | 3 |
DOIs | |
Publication status | Published - Mar 2019 |
Externally published | Yes |
Keywords
- ZrTe nanoribbons
- boundary-phonon scattering
- figure of merit
- thickness-dependent thermal conductivity