DataVXAdvanced Electronic MaterialsPaper
journal article·2023-03Open access

Enhancement of the Magnetoresistance in the Mobility‐Engineered Compensated Metal Pt5P2

Alex H. Mayo, Hidefumi Takahashi, Shintaro Ishiwata, Karolina Górnicka, Michał J. Winiarski, Jan Jaroszynski, Robert J. Cava, Weiwei Xie, Tomasz Klimczuk

Advanced Electronic Materials· Volume 9· Issue 3
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Source abstract

Abstract

Abstract The magnetoresistance (MR) in nonmagnetic materials continues to be a fertile research area in materials science. The search for giant, positive MR has been limited to a rather small window of materials such as high‐mobility semimetals in single‐crystalline form. Here, the observation of a very large positive MR in metallic Pt5P2 in polycrystalline form is reported. The observations reveal that improvement of the crystallinity results in a significant enhancement of the positive MR, exceeding 10 000% at 9 T, comparable to high‐mobility semimetals. Based on first‐principles calculations combined with magnetotransport and thermoelectric measurements, the Fermi surface of Pt5P2 is found to consist of a collection of multiple electron and hole pockets compensating one another, along with a characteristic pocket continuously connected to the adjacent Brillouin zone, together with possible topologically protected band crossings. This work extends the landscape of high MR candidate materials to polycrystalline metals, which demonstrates the importance of crystallinity and purity of the samples for the optimization of the MR.
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Research context

OpenAlex topics: Topological Materials and Phenomena · Magnetic properties of thin films · Magnetic and transport properties of perovskites and related materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Division of Materials Physics and Center for Spintronics Research Network (CSRN) Graduate School of Engineering Science Osaka University Osaka 560‐8531 Japan

Department of Applied Physics The University of Tokyo Tokyo 113‐8656 Japan

Faculty of Applied Physics and Mathematics Gdańsk University of Technology Narutowicza 11/12 Gdansk 80‐233 Poland

Advanced Materials Center Gdańsk University of Technology Narutowicza 11/12 Gdansk 80‐233 Poland

National High Magnetic Field Laboratory 1800 E. Paul Dirac Drive Tallahassee FL 32310 USA

Department of Chemistry Princeton University Princeton NJ 08540 USA

Department of Chemistry Michigan State University Michigan MI 48824 USA

Funding

Narodowe Centrum Nauki · Gordon and Betty Moore Foundation · U.S. Department of Energy · Japan Society for the Promotion of Science · National High Magnetic Field Laboratory

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