Large transverse magneto-thermoelectric effect in narrow-band-gap polycrystalline Ag2−δTe

Abstract

To achieve practical applications of transverse thermoelectricity, it is essential to discover novel high-performance polycrystalline transverse magneto-thermoelectric materials. Herein, we find that polycrystalline Ag_2−δTe exhibits a peak Nernst thermopower of 625 μV K⁻¹ at 75 K under a magnetic field of 14 T. Such a high value might originate from the enhanced bipolar effect and the crossed linear band near the low-temperature N–P transition. Our studies suggest the promising potential of Ag₂Te-based materials for energy conversion utilizing the Nernst effect and open up a new avenue for the development of novel magneto-thermoelectric materials.