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.

18 Pages Text + Figs: Accepted J. Phys. D

References in corpus (11)

• Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
• Topological Semimetals
• Gate-Voltage Control of Chemical Potential and Weak Anti-localization in Bismuth Selenide
• Weak Antilocalization Effect and Noncentrosymmetric Superconductivity in a Topologically Nontrivial Semimetal LuPdBi
• Transition from semiconducting to metallic-like conducting and weak antilocalization effect in single crystals of LuPtSb
• Fermions and bosons in nonsymmorphic PdSb2 with sixfold degeneracy
• Observation of sixfold degenerate fermions in PdSb${}_2$
• Weak antilocalization effect due to topological surface states in Bi${}_2$Se${}_{2.1}$Te${}_{0.9}$
• Low temperature saturation of phase coherence length in topological insulators
• 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