Berlin 2024 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 37: Poster IV
HL 37.24: Poster
Wednesday, March 20, 2024, 18:00–20:30, Poster F
Electrical and Magnetotransport of the correlated metal CaVO3 — •Mahni Müller1, Maria Espinosa1, Tatiana Kuznetsova2, Roman Engel-Herbert2,3, and Saskia F. Fischer1,4 — 1Novel Materials Group, Humboldt Universität Berlin, 12489 Berlin, Germany — 2Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA. — 3Paul-Drude-Institut für Festkörperelektronik, 10117 Berlin, Germany — 4Center of the Science of Materials Berlin, 12489 Berlin, Germany
High-performance and cost-effective transparent conductive materials are in great demand in the optoelectronic industry. Correlated metals offer an alternative strategy to design a material with both high-optical transparency and high-electrical conductivity. In order to test this, the transport phenomena in these materials must be studied [1].
We have recently studied the electric transport characteristics of thin CaVO3 films, which exceeded a residual-resistivity ratio RRR of 90 [2]. In this work, we study the temperature-dependent resistivity, Hall- and magneto-resistance between 4.2 K and 300 K. Films with high RRR showed increasingly nonlinear Hall resistivities and linear magnetoresistance below 40 K. Deviations from the Fermi liquid T2 dependence of the resistivity were also observed. These deviations are discussed together with a multi-carrier model and the influence of the complex Fermi surface of CaVO3 on the transport properties.
[1] Zhang, Lei, et al.; Nature materials 15.2, 204-210 (2016).
[2] Tatiana Kuznetsova, et al.; APL Mater. ; 11 (4): 041120 (2023).
Keywords: correlated metal; Fermi liquid; transparent conductor; perovskite; electron-electron