Magnetic impurity induced states in superconducting Bi$_{2}$Sr$_{2}$CaCuO$_{8+\delta}$

ORAL

Abstract

We revisit the Ni impurity problem in superconducting Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+\delta}$ (BSCCO-2212) using the Bogoliubov- de Gennes (BdG)-Wannier approach [1, 2]. We solve the self-consistent BdG equations on a square lattice and use first principle-based Wannier function to compute the local density of states (LDOS) with sub-atomic resolution in the vicinity of a magnetic impurity. We find two spin-resolved virtual bound states localized around the impurity position. The spatial LDOS patterns at the resonance energies are found to be in excellent agreement with STM experiment [3], and can be understood by accounting for the tails of Cu Wannier function.\\[4pt] [1] Peayush Choubey, T. Berlijn, A. Kreisel, C. Cao and P. J. Hirschfeld, Phys. Rev. B. 90, 134520 (2014).\\[0pt] [2] A. Kreisel, Peayush Choubey, T. Berlijn, B. M. Andersen and P. J. Hirschfeld, arxiv: 1407.1846 (2014).\\[0pt] [3] E. W. Hudson, K. M. Lang, V. Madhavan, S. H. Pan, H. Eisaki, S. Uchida and J. C. Davis, Nature, 411, 920 (2001).

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Authors

  • Peayush Choubey

    University of Florida

  • Andreas Kreisel

    University of Copenhagen, Niels Bohr Institute, Denmark, Niels Bohr Institute, University of Copenhagen

  • Tom Berlijn

    Oak Ridge National Laboratory, Oak Ridge National Laboratory, USA

  • Brian M. Andersen

    University of Copenhagen, Niels Bohr Institute, Denmark, Niels Bohr Institute, Niels Bohr Institute, University of Copenhagen, Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark

  • Peter Hirschfeld

    University of Florida, University of Florida, USA, Department of Physics, University of Florida, Department of Physics, University of Florida, Gainesville, USA, Department of Physics, University of Florida, Gainesville, FL