Observation of surface states on heavily indium doped SnTe(111), a superconducting topological crystalline insulator

Abstract

The topological crystalline insulator tin telluride is known to host superconductivity when doped with indium (Sn${}_{1-x}$In${}_x$Te), and for low indium contents ($x=0.04$) it is known that the topological surface states are preserved. Here we present the growth, characterization and angle resolved photoemission spectroscopy analysis of samples with much heavier In doping (up to $x\approx 0.4$), a regime where the superconducting temperature is increased nearly fourfold. We demonstrate that despite strong p-type doping, Dirac-like surface states persist.

References in corpus (24)

• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Search for Majorana fermions in superconductors
• Superconductivity in CuxBi2Se3 and its implications for pairing in the undoped topological insulator
• Experimental realization of a topological crystalline insulator in SnTe
• Hexagonal Warping Effects in the Surface States of Topological Insulator Bi${}_2$Te${}_3$
• Topological Crystalline Insulators and Topological Superconductors: From Concepts to Materials
• A topological crystalline insulator (TCI) phase via topological phase transition and crystalline mirror symmetry
• Topological Superconductivity in CuxBi2Se3
• Odd-Parity Pairing and Topological Superconductivity in a Strongly Spin-Orbit Coupled Semiconductor
• Momentum space imaging of Cooper pairing in a half-Dirac-gas topological superconductor (a helical 2D topological superconductor)
• Higher-order contributions to the Rashba-Bychkov effect with application to Bi/Ag(111) surface alloy
• Experimental observation of Dirac-like surface states and topological phase transition in Pb${}_{1-x}$Sn${}_x$Te(111) films
• Two types of Dirac-cone surface states on (111) surface of topological crystalline insulator SnTe
• Enhanced superconducting pairing interaction in indium-doped tin telluride
• Band structure of SnTe studied by Photoemission Spectroscopy
• Fermiology of Strongly Spin-Orbit Coupled Superconductor Sn1-xInxTe and its Implication to Topological Superconductivity
• 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
• Observation of topological crystalline insulator surface states on (111)-oriented Pb${}_{1-x}$Sn${}_x$Se films
• Relationship between Fermi-Surface Warping and Out-of-Plane Spin Polarization in Topological Insulators: a View from Spin-Resolved ARPES
• Spin-Triplet Vortex State in the Topological Superconductor CuxBi2Se3
• Anisotropic effect of warping on the lifetime broadening of topological surface states in angle-resolved photoemission from Bi${}_2$Te${}_3$
• Anisotropy effects on Rashba and topological insulator spin polarized surface states: a unified phenomenological description
• Studies of the superconducting properties of Sn1-xInxTe (x=0.38 to 0.45) using muon-spin spectroscopy

Cited by in corpus (15)

• CsV${}_3$Sb${}_5$: a ${\mathbb{Z}}_2$ topological kagome metal with a superconducting ground state
• Frustrated Spin One On A Diamond Lattice
• Electronic properties of SnTe-class topological crystalline insulator materials
• Experimental search for the origin of low-energy modes in topological materials
• Defect-free SnTe topological crystalline insulator nanowires grown by molecular beam epitaxy on graphene
• Observation of oscillatory relaxation in the Sn-terminated surface of epitaxial rock-salt SnSe $\{111\}$ topological crystalline insulator
• Electron and hole contributions to normal-state transport in the superconducting system Sn${}_{1-x}$In${}_x$Te
• ARPES study of the epitaxially grown topological crystalline insulator SnTe(111)
• Interfacial-state coupling induced topological phase transitions in SnTe (110) thin film
• Molecular beam epitaxy of superconducting Sn${}_{1-x}$In${}_x$Te thin films
• Nodeless superconducting gap in the candidate topological superconductor Sn${}_{1-x}$In${}_x$Te for x = 0.7
• Suppression of the Spectral Weight of Topological Surface States on the Nanoscale via Local Symmetry Breaking
• Full superconducting gap in the candidate topological superconductor In${}_{1-x}$Pb${}_x$Te for x = 0.2
• Non-Trivial Topological Phase in the Sn_{1-x}In_xTe Superconductor
• Proximity-Induced Superconductivity in a Topological Crystalline Insulator