Negative longitudinal magnetoresistance in the Dirac semimetal PtSe 2 : Kondo effect and surface spin dynamics
Sprache des Titels:
Englisch
Original Kurzfassung:
The emergence of negative longitudinal magnetoresistance in the topologically nontrivial transition-metal
dichalcogenide PtSe 2 is studied. Low-T , high-?0H transport is performed for arbitrary field directions, and an
analytical framework is established. The source of the negative longitudinal magnetoresistance is identified as the
Kondo effect stemming from Pt vacancies contributing an uncompensated spin exclusively at the sample surface.
The concentration of vacancies and the sample thickness are identified as tuning parameters. The findings are
substantiated by density functional theory, which corroborates the proposed Pt-vacancy model.
Forschungs-