pp. 2073-2083
S&M1661 Research Paper of Special Issue https://doi.org/10.18494/SAM.2018.1957 Published: September 28, 2018 First-principles Simulation of Piezoresistivity of Transition Metal Dichalcogenide Monolayers [PDF] Koichi Nakamura (Received April 5, 2018; Accepted July 23, 2018) Keywords: transition metal dichalcogenide, gauge factor, piezoresistivity, first-principles calculation
Longitudinal gauge factors of transition metal dichalcogenide (TMDC) monolayer models have been evaluated by first-principles calculation. TMDC monolayers have a multivalley/multipeak electronic structure, and uniaxial tensile strain causes a significant change in electrical conductivity through carrier redistribution in conduction-band valleys or valence-band peaks for some species of doped TMDC monolayers. A high piezoresistivity was observed selectively depending on the combination of transition metal and chalcogen atoms. In this simulation, a p-doped MoS2 monolayer model gave high longitudinal gauge factors of 94.2 and 87.4 at 20 ℃ in the carrier concentration range of 1017–1019 cm−3.
Corresponding author: Koichi NakamuraCite this article Koichi Nakamura, First-principles Simulation of Piezoresistivity of Transition Metal Dichalcogenide Monolayers, Sens. Mater., Vol. 30, No. 9, 2018, p. 2073-2083. |