title: Magnetic and superconducting phase diagram of the half-Heusler topological semimetal HoPdBi.
abstract: We report a study of the magnetic and electronic properties of the non-centrosymmetric half-Heusler antiferromagnet HoPdBi (TN = 2.0 K). Magnetotransport measurements show HoPdBi has a semimetallic behavior with a carrier concentration n = 3.7 × 10(18) cm(-3) extracted from the Shubnikov-de Haas effect. The magnetic phase diagram in the field-temperature plane has been determined by transport, magnetization, and thermal expansion measurements: magnetic order is suppressed at BM ~ 3.6 T for T --> 0. Superconductivity with Tc ~ 1.9 K is found in the antiferromagnetic phase. Ac-susceptibility measurements provide solid evidence for bulk superconductivity below Tc = 0.75 K with a screening signal close to a volume fraction of 100%. The upper critical field shows an unusual linear temperature variation with Bc2(T --> 0) = 1.1 T. We also report electronic structure calculations that classify HoPdBi as a new topological semimetal, with a non-trivial band inversion of 0.25 eV.
authors.affiliation: Van der Waals - Zeeman Institute, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands.
authors.forename: A M
authors.initials: AM
authors.lastname: Nikitin
authors.forename: Y
authors.initials: Y
authors.lastname: Pan
authors.forename: X
authors.initials: X
authors.lastname: Mao
authors.forename: R
authors.initials: R
authors.lastname: Jehee
authors.forename: G K
authors.initials: GK
authors.lastname: Araizi
authors.forename: Y K
authors.initials: YK
authors.lastname: Huang
authors.forename: C
authors.initials: C
authors.lastname: Paulsen
authors.forename: S C
authors.initials: SC
authors.lastname: Wu
authors.forename: B H
authors.initials: BH
authors.lastname: Yan
authors.forename: A
authors.initials: A
authors.lastname: de Visser