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Cadmium arsenide (Cd3As2) is a three-dimensional Dirac semimetal with many unique electronic properties that are of interest for future device applications. Here, we demonstrate field effect transistors using Cd3As2 as the channel material. We show that current densities exceed 5 A/mm and that very low contact resistances can be achieved even in unoptimized device structures. These properties make Cd3As2 of great interest for future high-speed electronics. We report on the current modulation characteristics of field effect transistors as a function of temperature. At low temperatures, the modulation exceeds 70%. We discuss material and device engineering approaches that can improve the device performance at room temperature.Cadmium arsenide (Cd3As2) is a three-dimensional Dirac semimetal with many unique electronic properties that are of interest for future device applications. Here, we demonstrate field effect transistors using Cd3As2 as the channel material. We show that current densities exceed 5 A/mm and that very low contact resistances can be achieved even in unoptimized device structures. These properties make Cd3As2 of great interest for future high-speed electronics. We report on the current modulation characteristics of field effect transistors as a function of temperature. At low temperatures, the modulation exceeds 70%. We discuss material and device engineering approaches that can improve the device performance at room temperature.

Field-effect transistors with the three-dimensional Dirac semimetal cadmium arsenide