Mandia, Anup Kumar Kumar, Rohit Koshi, Namitha Anna Lee, Seung-Cheol Bhattacharjee, Satadeep Muralidharan, Bhaskaran 2024-01-19T08:34:06Z 2024-01-19T08:34:06Z 2023-09-27 2023-09 0031-8949 https://pubs.kist.re.kr/handle/201004/113308 The two-dimensional compound group of MXenes, which exhibit unique optical, electrical, chemical, and mechanical properties, are an exceptional class of transition metal carbides and nitrides. In addition to traditional applications in Li-S, Li-ion batteries, conductive electrodes, hydrogen storage, and fuel cells, the low lattice thermal conductivity coupled with high electron mobility in the semiconducting oxygen-functionalized MXene Ti2CO2 has led to the recent interests in highperformance thermoelectric and nanoelectronic devices. Apart from the above dc- transport applications, it is crucial to also understand ac- transport across them, given the growing interest in applications surrounding wireless communications and transparent conductors. In this work, we investigate using our recently developed ab initio transport model, the real and imaginary components of electron mobility and conductivity to conclusively depict carrier transport beyond the room temperature for frequency ranges upto the terahertz range. Wealso contrast the carrier mobility and conductivity with respect to the Drude ' s model to depict its inaccuracies for a meaningful comparison with experiments. Our calculations show the effect of acoustic deformation potential scattering, piezoelectric scattering, and polar optical phonon scattering mechanisms. Without relying on experimental data, our model requires inputs calculated from first principles using density functional theory. Our results set the stage for providing ab initio based ac-transport calculations given the current research on MXenes for high-frequency applications. English Royal Swedish Academy of Sciences High-frequency complex impedance analysis of the two-dimensional semiconducting MXene Ti2CO2 Article 10.1088/1402-4896/acf07c 1 Physica Scripta, v.98, no.9 Physica Scripta 98 9 N scie scopus 001056870300001 2-s2.0-85169976842 Physics, Multidisciplinary Physics Article TOTAL-ENERGY CALCULATIONS ELECTRON-MOBILITY MECHANICAL-PROPERTIES TI3C2X2 X TRANSPORT CAPACITY GRAPHENE LI FAMILY ANODE 2D-MXenes Ab-initio based transport ac-conductivity