Electrochemical synthesis and superconducting phase diagram of Cu_xBi2Se3

Abstract

The superconducting Cu_xBi_2Se_3 is an electron-doped topological insulator and is a prime candidate of the topological superconductor which still awaits discovery. The electrochemical intercalation technique for synthesizing Cu_xBi2Se3 offers good control of restricting Cu into the van-der-Waals gap and yields samples with shielding fractions of up to ~50%. We report essential details of this synthesis technique and present the established superconducting phase diagram of T_c vs x, along with a diagram of the shielding fraction vs x. Intriguingly, those diagrams suggest that there is a tendency to spontaneously form small islands of optimum superconductor in this material.

6 pages, 4 figures

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Cited by in corpus (28)

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• A comprehensive review on topological superconducting materials and interfaces
• Superconductivity in Potassium-intercalated Td-WTe2
• Exploring Topological Superconductivity in Topological Materials
• Superconducting doped topological materials
• Dependence of superconductivity in CuxBi2Se3 on quenching conditions
• Anomalous suppression of the superfluid density in the CuxBi2Se3 superconductor upon progressive Cu intercalation
• Direction and symmetry transition of the vector order parameter in topological superconductors Cu${}_x$Bi${}_2$Se${}_3$
• Unexpected superconductivity at nanoscale junctions made on the topological crystalline insulator Pb${}_{0.6}$Sn${}_{0.4}$Te
• Evidence for singular-phonon-induced nematic superconductivity in a topological superconductor candidate Sr${}_{0.1}$Bi${}_2$Se${}_3$
• Topological properties of Mo${}_2$C and W${}_2$C superconductors
• Superconductivity, pairing symmetry, and disorder in the doped topological insulator Sn${}_{1-x}$In${}_x$Te for x $\ge$ 0.10
• Doping-dependent charge dynamics in CuxBi2Se3
• Surface states and local spin susceptibility in doped three-dimensional topological insulators with odd-parity superconducting pairing symmetry
• Self-consistent study of Abelian and non-Abelian order in a two-dimensional topological superconductor
• Chemical Principles of Intrinsic Topological Superconductors
• Crystal structure and distortion of superconducting Cu${}_x$Bi${}_2$Se${}_3$
• Proximity effects at the interface of a superconductor and a topological insulator in NbN - Bi_2Se_3 thin film bilayers
• The Vertical Position of Sr Dopants in the Sr${}_x$Bi${}_2$Se${}_3$ Superconductor
• Spin-Nernst Effect in Time-Reversal-Invariant Topological Superconductors
• Observability of superconductivity in Sr-doped Bi2Se3 at the surface using scanning tunneling microscope
• Possible Lattice and Charge Order in CuxBi2Te2Se
• Manipulating the nematic director by magnetic fields in the spin-triplet superconducting state of CuxBi2Se3
• Spontaneous Lattice Distortion in the Spin-Triplet Superconductor Cu${}_x$Bi${}_2$Se${}_3$
• Possible two-component pairings in electron-doped Bi${}_2$Se${}_3$ based on a tight-binding model
• Unconventional superconductivity from electronic dipole fluctuations