Interpretation of scanning tunneling quasiparticle interference and impurity states in cuprates

Kreisel, Andreas; Choubey, Peayush; Berlijn, Tom; Ku, W.; Andersen, Brian M.; Hirschfeld, Peter J.

doi:10.1103/PhysRevLett.114.217002

Title: Interpretation of scanning tunneling quasiparticle interference and impurity states in cuprates

Journal Article · Wed May 27 00:00:00 EDT 2015 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.114.217002· OSTI ID:1186008

Kreisel, Andreas ^[1]; Choubey, Peayush ^[2]; Berlijn, Tom ^[3]; Ku, W. ^[4]; Andersen, Brian M. ^[5]; Hirschfeld, Peter J. ^[2]

Univ. of Florida, Gainesville, FL (United States); Univ. of Copenhagen, Copenhagen (Denmark)
Univ. of Florida, Gainesville, FL (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States)
Univ. of Copenhagen, Copenhagen (Denmark)

We apply a recently developed method combining first principles based Wannier functions with solutions to the Bogoliubov–de Gennes equations to the problem of interpreting STM data in cuprate superconductors. We show that the observed images of Zn on the surface of Bi₂Sr₂CaCu₂O₈ can only be understood by accounting for the tails of the Cu Wannier functions, which include significant weight on apical O sites in neighboring unit cells. This calculation thus puts earlier crude “filter” theories on a microscopic foundation and solves a long-standing puzzle. We then study quasiparticle interference phenomena induced by out-of-plane weak potential scatterers, and show how patterns long observed in cuprates can be understood in terms of the interference of Wannier functions above the surface. Furthermore, our results show excellent agreement with experiment and enable a better understanding of novel phenomena in the cuprates via STM imaging.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC05-00OR22725; SC00112704; FG02-05ER46236

OSTI ID:: 1186008

Alternate ID(s):: OSTI ID: 1226027; OSTI ID: 1228169

Report Number(s):: BNL-108204-2015-JA; PRLTAO

Journal Information:: Physical Review Letters, Vol. 114, Issue 21; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 44 works

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