Indium substitution effect on the topological crystalline insulator family (Pb${}_{1-x}$Sn${}_x$)${}_{1-y}$In${}_y$Te: Topological and superconducting properties

Abstract

Topological crystalline insulators (TCIs) have been of great interest in the area of condensed matter physics. We investigated the effect of indium substitution on the crystal structure and transport properties in the TCI system (Pb${}_{1-x}$Sn${}_x$)${}_{1-y}$In${}_y$Te. For samples with a tin concentration $x\le 50\%$, the low-temperature resisitivities show a dramatic variation as a function of indium concentration: with up to ~2% indium doping the samples show weak-metallic behavior, similar to their parent compounds; with ~6% indium doping, samples have true bulk-insulating resistivity and present evidence for nontrivial topological surface states; with higher indium doping levels, superconductivity was observed, with a transition temperature, Tc, positively correlated to the indium concentration and reaching as high as 4.7 K. We address this issue from the view of bulk electronic structure modified by the indium-induced impurity level that pins the Fermi level. The current work summarizes the indium substitution effect on (Pb,Sn)Te, and discusses the topological and superconducting aspects, which can be provide guidance for future studies on this and related systems.

arXiv comment16 pages, 8 figures

References in corpus (57)

• 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
• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• A topological Dirac insulator in a quantum spin Hall phase : Experimental observation of first strong topological insulator
• Topological Crystalline Insulators
• Topological Insulator Materials
• Topological Crystalline Insulators in the SnTe Material Class
• Superconductivity in CuxBi2Se3 and its implications for pairing in the undoped topological insulator
• Experimental realization of a topological crystalline insulator in SnTe
• Topological crystalline insulator states in Pb(1-x)Sn(x)Se
• Odd-Parity Topological Superconductors: Theory and Application to Cu${}_x$Bi${}_2$Se${}_3$
• Aharonov-Bohm interference in topological insulator nanoribbons
• Topological Superconductivity and Superfluidity
• A topological crystalline insulator (TCI) phase via topological phase transition and crystalline mirror symmetry
• Topological Superconductivity in CuxBi2Se3
• p-type Bi2Se3 for topological insulator and low temperature thermoelectric applications
• Two-dimensional Dirac fermions in a topological insulator: transport in the quantum limit
• Topological origin of subgap conductance in insulating bilayer graphene
• Majorana mode in vortex core of Bi2Te3/NbSe2 topological insulator-superconductor heterostructure
• The Coexistence of Superconductivity and Topological Order in the Bi2Se3 Thin Films
• Bulk Band Gap and Surface State Conduction Observed in Voltage-Tuned Crystals of the Topological Insulator Bi${}_2$Se${}_3$
• Strong surface scattering in ultrahigh mobility Bi2Se3 topological insulator crystals
• Thickness-independent transport channels in topological insulator Bi2Se3 thin films
• Spin-Rotation Symmetry Breaking in the Superconducting State of CuxBi2Se3
• Thickness-dependent bulk properties and weak anti-localization effect in topological insulator Bi2Se3
• Fermi Surface Topological Invariants for Time Reversal Invariant Superconductors
• Topological Superconductor Bi2Te3/NbSe2 heterostructures
• Local Measurements of the Superconducting Pairing Symmetry in CuxBi2Se3
• Odd-Parity Pairing and Topological Superconductivity in a Strongly Spin-Orbit Coupled Semiconductor
• Fully gapped topological surface states in Bi${}_2$Se${}_3$ films induced by a d-wave high-temperature superconductor
• Topological Crystalline Insulators and Dirac Octets in Anti-perovskites
• Low carrier concentration crystals of the topological insulator Bi${}_2$Te${}_2$Se
• Tunability of the k-space Location of the Dirac Cones in the Topological Crystalline Insulator Pb1-xSnxTe
• Rock-salt SnS and SnSe: Native Topological Crystalline Insulators
• Unusual nature of fully-gapped superconductivity in In-doped SnTe
• Sn-doped Bi1.1Sb0.9Te2S, a bulk topological insulator with ideal properties
• Experimental observation of Dirac-like surface states and topological phase transition in Pb${}_{1-x}$Sn${}_x$Te(111) films
• Why is the bulk resistivity of topological insulators so small?
• Enhanced superconducting pairing interaction in indium-doped tin telluride
• Symmetry breaking and Landau quantization in topological crystalline insulators
• Unconventional superconductivity in CuxBi2Se3
• Fermiology of Strongly Spin-Orbit Coupled Superconductor Sn1-xInxTe and its Implication to Topological Superconductivity
• Pressure-induced Topological Phase Transitions in Rock-salt Chalcogenides
• Optimizing the superconducting transition temperature and upper critical field of Sn(1-x)In(x)Te
• Superconducting properties of the In substituted Topological Crystalline Insulator, SnTe
• Quantum Coherent Transport in SnTe Topological Crystalline Insulator Thin Films
• Resonance-state-induced superconductivity at high Indium contents in In-doped SnTe
• Superconductivity induced by In substitution into the topological crystalline insulator Pb(0.5)Sn(0.5)Te
• Studies of the superconducting properties of Sn1-xInxTe (x=0.38 to 0.45) using muon-spin spectroscopy
• Surface-state-dominated transport in crystals of the topological crystalline insulator In-doped Pb${}_{1-x}$Sn${}_x$Te
• Fully gapped superconductivity in In-doped topological crystalline insulator Pb${}_{0.5}$Sn${}_{0.5}$Te
• Weak antilocalization in (111) thin films of a topological crystalline insulator SnTe
• Superconducting Dome and Crossover to an Insulating State in [Tl4]Tl1-xSnxTe3
• Quasi-localized Impurity State in Doped Topological Crystalline Insulator Sn${}_{0.9}$In${}_{0.1}$Te Probed by ${}^{125}$Te-NMR

Cited by in corpus (8)

• Unusual phonon density of states and response to the superconducting transition in the In-doped topological crystalline insulator Pb${}_{0.5}$Sn${}_{0.5}$Te
• Electron-phonon coupling and superconductivity in the doped topological-crystalline insulator (Pb${}_{0.5}$Sn${}_{0.5}$)${}_{1-x}$In${}_x$Te
• Versatile electronic states in epitaxial thin films of (Sn-Pb-In)Te: from topological crystalline insulator and polar semimetal to superconductor
• Full superconducting gap in the candidate topological superconductor In${}_{1-x}$Pb${}_x$Te for x = 0.2
• Large surface conductance and two-dimensional superconductivity in microstructured crystalline topological insulators
• Superconductivity in tin telluride films grown by molecular beam epitaxy
• Possible Topological Superconductivity in a Topological Crystalline Insulator (Pb${}_{1-x}$Sn${}_x$)${}_{1-y}$In${}_y$Te
• Berry curvature generation detected by Nernst responses in ferroelectric Weyl semimetal