Antiferromagnetism and superconductivity in the half-Heusler semimetal HoPdBi

Abstract

We observed the coexistence of superconductivity and antiferromagnetic order in the single-crystalline ternary pnictide HoPdBi, a plausible topological semimetal. The compound orders antiferromagnetically at $T_N=$1.9 K and exhibits superconductivity below $T_c=$0.7 K, which was confirmed by magnetic, electrical transport and specific heat measurements. The specific heat shows anomalies corresponding to antiferromagnetic ordering transition and crystalline field effect, but not to superconducting transition. Single-crystal neutron diffraction indicates that the antiferromagnetic structure is characterized by the (1/2, 1/2, 1/2) propagation vector. Temperature variation of the electrical resistivity reveals two parallel conducting channels of semiconducting and metallic character. In weak magnetic fields, the magnetoresistance exhibits weak antilocalization effect, while in strong fields and temperatures below 50 K it is large and negative. At temperatures below 7 K Shubnikov-de Haas oscillations with two frequencies appear in the resistivity. These oscillations have non-trivial Berry phase, which is a distinguished feature of Dirac fermions.

References in corpus (12)

• The electronic properties of graphene
• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Antiferromagnetic topological insulators
• Phase analysis of quantum oscillations in graphite
• Topological $R$PdBi half-Heusler semimetals: a new family of non-centrosymmetric magnetic superconductors
• Weak Antilocalization Effect and Noncentrosymmetric Superconductivity in a Topologically Nontrivial Semimetal LuPdBi
• Shubnikov-de Haas oscillations, weak antilocalization effect and large linear magnetoresistance in the putative topological superconductor LuPdBi
• Magnetic and transport properties of rare-earth-based half-Heusler phases RPdBi: prospective systems for topological quantum phenomena
• Magnetic field tuned quantum criticality of heavy fermion system YbPtBi
• Transversal magnetoresistance in Weyl semimetals
• Magnetic and superconducting phase diagram of the half-Heusler topological semimetal HoPdBi
• Topological Effects on the Magnetoconductivity in Topological Insulators

Cited by in corpus (17)

• Superconductivity in half-Heusler compound TbPdBi
• Model Hamiltonian and Time Reversal Breaking Topological Phases of Anti-ferromagnetic Half-Heusler Materials
• Anomalous Hall effect and negative longitudinal magnetoresistance in half-Heusler topological semimetal candidates TbPtBi and HoPtBi
• Negative longitudinal magnetoresistance as a sign of a possible chiral magnetic anomaly in the half-Heusler antiferromagnet DyPdBi
• Weak antilocalization in a noncentrosymmetric CaAgBi single crystal
• MgPd${}_2$Sb -- the first Mg-based Heusler-type superconductor
• Two-channel conduction in YbPtBi
• Topological surface conduction in Kondo insulator YbB${}_{12}$
• Observation of Dirac state in half-Heusler material YPtBi
• Magnetotransport signatures of chiral magnetic anomaly in the half-Heusler phase ScPtBi
• Nodal S-wave Superconductivity in Antiferromagnetic Semimetals
• Anisotropic exchange and non-collinear antiferromagnets on a noncentrosymmetric fcc structure as in the half-Heuslers
• Magnetic phenomena in equiatomic ternary rare earth compounds
• Strong-coupling superconductivity of the Heusler-type compound ScAu2Al: Ab-initio studies
• Transverse and Longitudinal Magnetothermopower Promoted by Ambipolar Effect in Half-Heusler Topological Materials
• Anomalous magnetotransport in the single-crystalline half-Heusler antiferromagnet ErPdSb
• Magnetic and electrical transport properties of the single-crystalline half-Heusler antiferromagnet DyNiSb