2022/03/26 by Xin Gui, R. J. Cava, Gui, Xin +1
Engineering · Materials Science · #FOS: Physical sciences #Ga2O3 and related materials #Gas Sensing Nanomaterials and Sensors #Materials Science (cond-mat.mtrl-sci) #Strongly Correlated Electrons (cond-mat.str-el) #Transition Metal Oxide Nanomaterials
paper · pdf · doi:10.48550/arxiv.2203.14160
openalex publication_date 2022/03/26 · openalex created_date 2022/04/03 · openalex updated_date 2026/07/28
VO2, of interest for decades due to both its phenomenology and its potential applications, has a monoclinic distortion of the rutile crystal structure at ambient temperature that is coupled to its metal-insulator transition (MIT). In contrast, RuO2 has three electrons more per formula unit, is a metallic conductor, and has an undistorted rutile structure. Here we report a systematic study of Ru-doped VO2 (V1-xRuxO2); generally characterizing its crystal structure, magnetic and electronic properties, and heat capacity. The composition-dependent Wilson ratio is determined. We find that an unusually high Ru doping value (x=0.8) is required to achieve a metallic state in V1-xRuxO2. No superconductivity was observed down to 0.1 K in the metallic materials. We propose a possible understanding for how the insulating state can exist in V1-xRuxO2 at high Ru contents.