title: Topological RPdBi half-Heusler semimetals: A new family of noncentrosymmetric magnetic superconductors.
abstract: We report superconductivity and magnetism in a new family of topological semimetals, the ternary half-Heusler compound RPdBi (R: rare earth). In this series, tuning of the rare earth f-electron component allows for simultaneous control of both lattice density via lanthanide contraction and the strength of magnetic interaction via de Gennes scaling, allowing for a unique tuning of the normal-state band inversion strength, superconducting pairing, and magnetically ordered ground states. Antiferromagnetism with ordering vector (½,½,½) occurs below a Néel temperature that scales with de Gennes factor dG, whereas a superconducting transition is simultaneously supressed with increasing dG. With superconductivity appearing in a system with noncentrosymmetric crystallographic symmetry, the possibility of spin-triplet Cooper pairing with nontrivial topology analogous to that predicted for the normal-state electronic structure provides a unique and rich opportunity to realize both predicted and new exotic excitations in topological materials.
authors.affiliation: Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD 20742, USA.
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Nakajima
authors.affiliation: Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD 20742, USA.
authors.forename: Rongwei
authors.initials: R
authors.lastname: Hu
authors.affiliation: Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD 20742, USA.
authors.forename: Kevin
authors.initials: K
authors.lastname: Kirshenbaum
authors.affiliation: Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD 20742, USA.
authors.forename: Alex
authors.initials: A
authors.lastname: Hughes
authors.affiliation: Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD 20742, USA.
authors.forename: Paul
authors.initials: P
authors.lastname: Syers
authors.affiliation: Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD 20742, USA.
authors.forename: Xiangfeng
authors.initials: X
authors.lastname: Wang
authors.affiliation: Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD 20742, USA.
authors.forename: Kefeng
authors.initials: K
authors.lastname: Wang
authors.affiliation: Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD 20742, USA.
authors.forename: Renxiong
authors.initials: R
authors.lastname: Wang
authors.affiliation: Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD 20742, USA.
authors.forename: Shanta R
authors.initials: SR
authors.lastname: Saha
authors.affiliation: NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA.
authors.forename: Daniel
authors.initials: D
authors.lastname: Pratt
authors.affiliation: NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA.
authors.forename: Jeffrey W
authors.initials: JW
authors.lastname: Lynn
authors.affiliation: Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD 20742, USA.
authors.forename: Johnpierre
authors.initials: J
authors.lastname: Paglione
keywords: Magnetism; Topological insulator; non-centrosymmetric; superconductivity