Experimental verification of semimetallic band structure in PtSe2 via thermoelectric power measurements

Abstract

This study presents an investigation of the band structure in a semimetallic two-dimensional (2D) PtSe2 nanosheet based on thermoelectric transport phenomena. Mechanically exfoliated PtSe2 nanosheets, including naturally doped nonneutral samples, were studied. The gatetuned electrical conductivity and thermoelectric power were measured by varying the temperature. Based on the combined effects of gatetuning and shifting of zero-gate energy level, the semimetallic band structure of 2D PtSe2 was confirmed in the band over a wide energy range. Furthermore, the temperature dependence of transport properties was investigated to determine the band structure and intrinsic properties. Published under an exclusive license by AIP Publishing.