Anisotropic angular magnetoresistance and Fermi surface topology of the candidate novel topological metal ${\mathrm{Pd}}_3\mathrm{Pb}$

Journal Article · 19 August 2018 · Physical Review Materials

DOI: https://doi.org/10.1103/PhysRevMaterials.2.081201 · OSTI ID:1471586

Ghimire, N. J. ^[1]; Khan, Mojammel A. ^[1]; Botana, A. S. ^[1]; Jiang, J. S. ^[1]; Mitchell, J. F. ^[1]

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1. Argonne National Lab. (ANL), Argonne, IL (United States)

In this paper, the recent realization of topological electronic states such as Dirac and Weyl fermions in real materials and their potential for future energy and electronics applications has motivated interest in the study of new forms of topological behavior embodied through new materials. Pd₃Pb is one such candidate predicted recently to host unique topological features, including a dispersionless band near the Fermi level and triple nodal points hosting Dirac fermions and open Fermi arcs. Here, we report the crystal growth and electric transport properties of Pd₃Pb. Our low field magnetoresistance measurements indicate an anisotropic Fermi surface. We found that Pd₃Pb manifests a large transverse magnetoresistance, which reaches 650% at 1.8 K and 14 T, and pronounced Shubnikov-de Haas (SdH) oscillations. Preliminary analysis of the field dependence of the SdH oscillations points to the likelihood of nontrivial Berry phase in Pd₃Pb. Further studies in high field limit are desirable to extend the realization of the topological properties of the predicted novel fermions in this material.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• Grant/Contract Number: AC02-06CH11357
• OSTI ID: 1471586
• Alternate ID(s): OSTI ID: 1465229
• Journal Information: Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 8 Vol. 2; ISSN PRMHAR; ISSN 2475-9953
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English