Sn2Pd: a possible superconducting material with topological surface states

Abstract

In this article, we report the detailed magneto transport measurements of the topological semimetal (TSM) candidate, Sn2Pd. Single crystal of Sn2Pd is synthesized through the self-flux method. Phase purity and crystalline morphology are confirmed through powder X ray diffraction (PXRD) pattern and field emission scanning electron microscopy (FESEM) image. Signatures of superconducting transition are seen in both transport and magneto transport measurements, which are further supported by the AC magnetization studies. Sn2Pd is found to show superconductivity onset at below 2.8K, but not the zero resistivity down to 2K. Although, isothermal magneto resistivity measurements below superconducting onset (2.8K) clearly exhibited superconductor-like behavior, but is not observed in heat capacity measurements, indicating the same to be of weak nature. Magnetotransport measurements performed in a normal state of Sn2Pd show the presence of a weak antilocalization (WAL) effect, which is confirmed by modeling of low field magneto-conductivity (MC) through Hikami Larkin Nagaoka (HLN) formalism. Here, it is worth mentioning that the present article is the first report on magneto transport measurements of Sn2Pd, which show the same to be a topological material with a weak superconducting phase below around 2.8K.

arXiv comment18 Pages Text + Figs: Accepted J. Phys. D

References in corpus (37)

• Topological insulators and superconductors
• Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
• Topological superconductors: a review
• Superconductivity in CuxBi2Se3 and its implications for pairing in the undoped topological insulator
• Catalogue of Topological Electronic Materials
• Topological Semimetals
• Topological Superconductivity in CuxBi2Se3
• Gate-Voltage Control of Chemical Potential and Weak Anti-localization in Bismuth Selenide
• Thickness-independent transport channels in topological insulator Bi2Se3 thin films
• Superconductivity with topological surface state in SrxBi2Se3
• Topological Semimetals from first-principles
• Large linear magnetoresistance in the Dirac semimetal TlBiSSe
• Topologically protected surface states in a centrosymmetric superconductor beta-PdBi2
• Surface dominated transport in single crystalline nanoflake devices of topological insulator Bi1.5Sb0.5Te1.8Se1.2
• Weak Antilocalization Effect and Noncentrosymmetric Superconductivity in a Topologically Nontrivial Semimetal LuPdBi
• Anisotropic Fermi Surface and Quantum Limit Transport in High Mobility 3D Dirac Semimetal Cd3As2
• Superconductivity and non-metallicity induced by doping the topological insulators Bi2Se3 and Bi2Te3
• Non-saturating large magnetoresistance in semimetals
• Superconductivity in Tl_{0.6}Bi_{2}Te_{3} Derived from a Topological Insulator
• Surface Superconductivity in the type II Weyl Semimetal TaIrTe4
• Resistance in Superconductors
• Large low-field positive magnetoresistance in nonmagnetic half-Heusler ScPtBi single crystal
• Time reversal symmetry breaking superconductivity in topological materials
• Transition from semiconducting to metallic-like conducting and weak antilocalization effect in single crystals of LuPtSb
• Direct observation of six-fold exotic fermions in topological semimetal PdSb${}_2$
• Properties and superconductivity in Ti-doped NiTe2 single crystals
• Observation of sixfold degenerate fermions in PdSb${}_2$
• Fermions and bosons in nonsymmorphic PdSb2 with sixfold degeneracy
• Low temperature saturation of phase coherence length in topological insulators
• Weak antilocalization effect due to topological surface states in Bi${}_2$Se${}_{2.1}$Te${}_{0.9}$
• Evolution of the topologically protected surface states in superconductor $\beta$-Bi${}_2$Pd from the three-dimensional to the two-dimensional limit
• Transport evidence for three dimensional topological superconductivity in doped $\beta$-PdBi${}_2$
• Prediction of superconductivity and topological aspects in single-layer $\beta$-Bi${}_2$Pd
• An investigation of type-I superconductivity in single crystal of Pb2Pd
• Bulk superconductivity and non-trivial band topology analysis of Pb2Pd
• Saturation of resistivity and Kohler's rule in Ni-doped La${}_{1.85}$Sr${}_{0.15}$CuO${}_4$ cuprate
• Anomalous Residual Surface Conductivity in a Superconductor with Strong Spin-Orbit Coupling