Enhanced thermopower and low thermal conductivity in p-type polycrystalline ZrTe5

Abstract

Thermoelectric properties of polycrystalline p-type ZrTe5 are reported in temperature (T) range 2 - 340 K. Thermoelectric power (S) is positive and reaches up to 458 uV/K at 340 K on increasing T. The value of Fermi energy 16 meV, suggests low carrier density of ~ 9.5 X 10^18 cm-3. A sharp anomaly in S data is observed at 38 K, which seems intrinsic to p-type ZrTe5. The thermal conductivity value is low (2 W/m-K at T = 300 K) with major contribution from lattice part. Electrical resistivity data shows metal to semiconductor transition at T ~ 150 K and non-Arrhenius behavior in the semiconducting region. The figure of merit zT (0.026 at T = 300 K) is ~ 63% higher than HfTe5 (0.016), and better than the conventional SnTe, p-type PbTe and bipolar pristine ZrTe5 compounds.

arXiv comment4 pages, 3 figures

References in corpus (8)

• Transition-Metal Pentatelluride ZrTe${}_5$ and HfTe${}_5$: a Paradigm for Large-gap Quantum Spin Hall Insulators
• Pressure-induced semimetal to superconductor transition in a three-dimensional topological material ZrTe5
• Quantum effects in the thermoelectric power factor of low-dimensional semiconductors
• Evidence for a Strong Topological Insulator Phase in $\mathrm{ZrT}{\mathrm{e}}_5$
• Spectroscopic evidence for bulk-band inversion and three-dimensional massive Dirac fermions in ZrTe5
• Lifshitz transition mediated electronic transport anomaly in bulk ZrTe5
• 3D nature of ZrTe${}_5$ band structure measured by high-momentum-resolution photoemission spectroscopy
• Coexistence of topological Dirac fermions in the surface and three-dimensional Dirac cone state in the bulk of ZrTe${}_5$ single crystal

Cited by in corpus (4)

• Phonon and Thermal Properties of Quasi-Two-Dimensional FePS3 and MnPS3 Antiferromagnetic Semiconductor Materials
• Thermal conductivity of the quasi-1D materials TaSe3 and ZrTe3
• Unusual magnetoresistance oscillations in preferentially oriented p-type polycrystalline ZrTe5
• Giant quantum oscillations in thermal transport in low-density metals via electron absorption of phonons