Structural and transport properties of 4f electron doped Y1-x(Dy)xPdBi topological semi-metallic thin films

Abstract

We report the effect of 4f electron doping on structural, electrical and magneto-transport properties of Dy doped half Heusler Y1-x(Dy)xPdBi (x =0, 0.2, 0.5, 1) thin films grown by pulsed laser deposition. The Dy doping leads to lattice contraction which increases from 0% for the parent x =0 sample to approx 1.3% for x=1 sample with increase in Dy doping. The electrical transport measurements show a typical semi-metallic behaviour in the temperature range 3K to 300K and a sharp drop in resistivity at low temperatures (less than 3K) for all the samples. Magnetotransport measurements and Shubnikov de-Hass oscillations at high magnetic fields demonstrate that for these topologically non-trivial samples, Dy doping induced lattice contraction plays an active role in modifying the Fermi surface, carrier concentration and the effective electron mass. There is an uniform suppression of the onset of superconductivity with increased Dy doping which is possibly related to the increasing local exchange field arising from the 4f electrons in Dy. Our results indicate that we can tune various band structure parameters of YPdBi by f electron doping and strained thin films of Y1-x(Dy)xPdBi show surface dominated relativistic carrier transport at low temperatures.

arXiv comment20 pages, 11 figures

References in corpus (23)

• Majorana Fermions and a Topological Phase Transition in Semiconductor-Superconductor Heterostructures
• Topological Insulator Materials
• Tunable Multifunctional Topological Insulators in Ternary Heusler Compounds
• A new platform for topological quantum phenomena : Topological Insulator states in thermoelectric Heusler-related ternary compounds
• Manifestation of Topological Protection in Transport Properties of Epitaxial Bi2Se3 Thin Films
• Topological Quantum Computation Based on Chiral Majorana Fermions
• Electrically tunable surface-to-bulk coherent coupling in topological insulator thin films
• Electronic Transport and quantum oscillation of Topological Semimetals
• Tunable Surface Conductivity in Bi2Se3 Revealed in Diffusive Electron Transport
• Superconductivity in the topological semimetal YPtBi
• Topological $R$PdBi half-Heusler semimetals: a new family of non-centrosymmetric magnetic superconductors
• Quantum Oscillations in a Topological Insulator Bi${}_2$Te${}_2$Se with Large Bulk Resistivity (6 $\Omega$cm)
• 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
• Superconductivity and magnetic order in the non-centrosymmetric Half Heusler compound ErPdBi
• Magnetic and transport properties of rare-earth-based half-Heusler phases RPdBi: prospective systems for topological quantum phenomena
• Unconventional superconductivity in YPtBi and related topological semimetals
• Topological insulator based spin valve devices: evidence for spin polarized transport of spin-momentum-locked topological surface states
• Large low-field positive magnetoresistance in nonmagnetic half-Heusler ScPtBi single crystal
• Transition from semiconducting to metallic-like conducting and weak antilocalization effect in single crystals of LuPtSb
• Negative longitudinal magnetoresistance as a sign of a possible chiral magnetic anomaly in the half-Heusler antiferromagnet DyPdBi
• Evidence for unconventional superconductivity in Half-Heusler YPdBi and TbPdBi compounds revealed by London penetration depth measurements
• NMR evidence for enhanced orbital diamagnetism in topologically nontrivial half-Heusler semimetals