Weak Antilocalization Effect and Noncentrosymmetric Superconductivity in a Topologically Nontrivial Semimetal LuPdBi

Abstract

A large number of half-Heusler compounds have been recently proposed as three-dimensional (3D) topological insulators (TIs) with tunable physical properties.However, no transport measurements associated with the topological surface states have been observed in these half-Heusler candidates due to the dominating contribution from bulk electrical conductance. Here we show that, by reducing the mobility of bulk carriers, a two-dimensional (2D) weak antilocalization (WAL) effect, one of the hallmarks of topological surface states, was experimentally revealed from the tilted magnetic field dependence of magnetoconductance in a topologically nontrivial semimetal LuPdBi. Besides the observation of a 2D WAL effect, a superconducting transition was revealed at Tc~1.7 K in the same bulk LuPdBi. Quantitative analysis within the framework of a generalized BCS theory leads to the conclusion that the noncentrosymmetric superconductivity of LuPdBi is fully gapped with a possibly unconventional pairing character. The co-existence of superconductivity and the transport signature of topological surface states in the same bulk alloy suggests that LuPdBi represents a very promising candidate as a topological superconductor.

20 pages, 5 Figs. Accepted by Scientific Reports

References in corpus (31)

• Topological Insulators
• Topological insulators and superconductors
• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Topological Insulators in Three Dimensions
• Classification of topological insulators and superconductors in three spatial dimensions
• Superconductivity in CuxBi2Se3 and its implications for pairing in the undoped topological insulator
• Tunable Multifunctional Topological Insulators in Ternary Heusler Compounds
• A new platform for topological quantum phenomena : Topological Insulator states in thermoelectric Heusler-related ternary compounds
• Topological Superconductivity and Superfluidity
• Gate-Voltage Control of Chemical Potential and Weak Anti-localization in Bismuth Selenide
• Impurity effect on weak anti-localization in the topological insulator Bi2Te3
• Unconventional superconductivity on a topological insulator
• Quantum interference in macroscopic crystals of non-metallic Bi${}_2$Se${}_3$
• Half-Heusler Compounds as a New Class of Three-Dimensional Topological Insulators
• Bulk superconducting phase with a full energy gap in the doped topological insulator Cu_xBi_2Se_3
• Topological odd-parity superconductors
• Superconductivity in the topological semimetal YPtBi
• Superconductivity in the noncentrosymmetric half-Heusler compound LuPtBi : A possible topological superconductor
• Electron-phonon Coupling on the Surface of the Topological Insulator Bi2Se3: Determined from Surface Phonon Dispersion Measurements
• Surface dominated transport in single crystalline nanoflake devices of topological insulator Bi1.5Sb0.5Te1.8Se1.2
• Large Linear Magnetoresistance and Shubnikov-de Hass Oscillations in Single Crystals of YPdBi Heusler Topological Insulators
• Weak Antilocalization and Conductance Fluctuation in a Sub-micrometer-sized Wire of Epitaxial Bi2Se3
• Superconductivity and magnetic order in the non-centrosymmetric Half Heusler compound ErPdBi
• Two-dimensional universal conductance fluctuations and the electron-phonon interaction of topological surface states in Bi2Te2Se nanoribbons
• Superconductivity in non-centrosymmetric YPtBi under pressure
• Magnetic and transport properties of rare-earth-based half-Heusler phases RPdBi: prospective systems for topological quantum phenomena
• A Ni-based Superconductor: the Heusler Compound ZrNi${}_2$Ga
• First direct observation of the Van Hove singularity in the tunneling spectra of cuprates
• Electronic and crystalline structures of zero band-gap PdLuBi thin films grown epitaxially on MgO(100)
• Tunneling conductance and local density of states in time-reversal symmetry breaking superconductors under the influence of an external magnetic field

Cited by in corpus (48)

• Topological $R$PdBi half-Heusler semimetals: a new family of non-centrosymmetric magnetic superconductors
• Intertwined vestigial order in quantum materials: nematicity and beyond
• Observation of Unusual Topological Surface States in Half-Heusler Compounds LnPtBi (Ln=Lu, Y)
• Pairing of j=3/2 fermions in half-Heusler superconductors
• Superconductivity in three-dimensional spin-orbit coupled semimetals
• Extremely large non-saturating magnetoresistance and ultrahigh mobility due to topological surface states in metallic Bi2Te3 topological insulator
• Shubnikov-de Haas oscillations, weak antilocalization effect and large linear magnetoresistance in the putative topological superconductor LuPdBi
• Half-Heusler topological insulators
• Topological superconductivity of spin-3/2 carriers in a three-dimensional doped Luttinger semimetal
• Antiferromagnetism and superconductivity in the half-Heusler semimetal HoPdBi
• Pairing states of spin-3/2 fermions: Symmetry-enforced topological gap functions
• Unconventional superconductivity in YPtBi and related topological semimetals
• Unconventional Superconductivity in Luttinger Semimetals: Theory of Complex Tensor Order and the Emergence of the Uniaxial Nematic State
• Z${}_2$ topology and superconductivity from symmetry lowering of a 3D Dirac Metal Au${}_2$Pb
• Superconductivity in half-Heusler compound TbPdBi
• High Electron Mobility and Large Magnetoresistance in the Half-Heusler Semimetal LuPtBi
• Large low-field positive magnetoresistance in nonmagnetic half-Heusler ScPtBi single crystal
• Type-II Dirac semimetals in the YPd${}_2$Sn class
• Magnetotransport properties and giant anomalous Hall angle in half-Heusler compound TbPtBi
• Topological Hall effect in the antiferromagnetic Dirac semimetal EuAgAs
• Transition from semiconducting to metallic-like conducting and weak antilocalization effect in single crystals of LuPtSb
• Magnetic and superconducting phase diagram of the half-Heusler topological semimetal HoPdBi
• Anomalous Hall effect and negative longitudinal magnetoresistance in half-Heusler topological semimetal candidates TbPtBi and HoPtBi
• Magnetic structure of the antiferromagnetic half-Heusler compound NdBiPt
• 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
• Weak antilocalization effect due to topological surface states in Bi${}_2$Se${}_{2.1}$Te${}_{0.9}$
• Majorana multipole response of topological superconductors
• Experimental and theoretical study of the correlated compound YbCdSn: Evidence for large magnetoresistance and mass enhancement
• Interacting spin-3/2 fermions in a Luttinger semimetal: Competing phases and their selection in the global phase diagram
• Facet Dependent Topological Phase Transition in Bi4Br4
• Detailed structural and topological analysis of SnBi2Te4 single crystal
• Probing the topological surface states in superconducting Sn4Au single crystal: A magneto transport study
• Weak antilocalization effect and triply degenerate state in Cu-doped CaAuAs
• Majorana multipole response: General theory and application to wallpaper groups
• Weak Antilocalization and topological edge states in PdSn${}_4$
• Magnetic field-dependent resistance crossover and logarithmic to non-saturating magnetoresistance in topological insulator Bi${}_2$Te${}_3$
• The Emerging Weak Antilocalization Effect in Semimetal Ta${}_{0.7}$Nb${}_{0.3}$Sb${}_2$ Single Crystal
• Intrinsic finite-energy Cooper pairing in $j=3/2$ superconductors
• Pressure tuning of structure, magnetic frustration and carrier conduction in Kitaev spin liquid candidate Cu${}_2$IrO${}_3$: X-ray, Raman, magnetic susceptibility, resistivity and first-principles analysis
• Weak antilocalization and Shubnikov-de Haas oscillations in CaCuSb single crystal
• Surface states induced weak anti-localization effect in Bi0.85Sb0.15 topological single crystal
• Large Magnetoresistance and Weak Antilocalization in V1-delta Sb2 Single Crystal
• A Family of Lanthanide Noncentrosymmetric Superconductors La${}_4$$TX$ ($T$ = Ru, Rh, Ir; $X$ = Al, In)
• Sn2Pd: a possible superconducting material with topological surface states
• Interplay between superconducting fluctuations and weak localization in disordered TiN thin films
• Structural and transport properties of 4f electron doped Y1-x(Dy)xPdBi topological semi-metallic thin films
• Anomalous magnetotransport in the single-crystalline half-Heusler antiferromagnet ErPdSb