Superconductivity inCuxBi2Se3and its Implications for Pairing in the Undoped Topological Insulator

2009/09/15 by Y. S. Hor, A. J. Williams, J. G. Checkelsky +11 · 3 citations
Materials Science · Mathematics · Physics and Astronomy · #2D Materials and Applications #Combinatorics #Condensed matter physics #Graphene research and applications #Intercalation (chemistry) #Materials science #Mathematics #Molecule #Pairing #Physics #Quantum mechanics #Superconductivity #Topological Materials and Phenomena #Topology (electrical circuits) #cond-mat.mtrl-sci #cond-mat.supr-con #van der Waals force

paper · pdf · doi:10.1103/physrevlett.104.057001

published as Physical Review Letters 104, 057001 (2010) · 6 pages, 4 figures

arxiv created 2009/09/15 · openalex publication_date 2010/02/01 · arxiv updated 2013/05/29 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Bi₂Se₃ is one of a handful of known topological insulators. Here we show that copper intercalation in the van der Waals gaps between the Bi₂Se₃ layers, yielding an electron concentration of \ensuremath∼2\ifmmode×\else\texttimes\fi10²⁰ cm^\ensuremath-3, results in superconductivity at 3.8 K in Cu_xBi₂Se₃ for 0.12\ensuremath≤x\ensuremath≤0.15. This demonstrates that Cooper pairing is possible in Bi₂Se₃ at accessible temperatures, with implications for studying the physics of topological insulators and potential devices.

Citations

• Topological Insulators with Inversion Symmetry
• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Exciton Condensation and Charge Fractionalization in a Topological Insulator Film

Cited by

• DFT based insights into elastic, thermophysical, electronic and optical properties of topological insulators XTe5 (X = Zr, Hf)
• Superconductivity induced by Ag intercalation in Dirac semimetal Bi2Se3
• Thermodynamic evidence for nematic superconductivity in CuxBi2Se3