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Title: Atomic-layer-resolved composition and electronic structure of the cuprate B i 2 S r 2 CaC u 2 O 8 + δ from soft x-ray standing-wave photoemission

Abstract

A major remaining challenge in the superconducting cuprates is the unambiguous differentiation of the composition and electronic structure of the CuO 2 layers and those of the intermediate layers. The large c axis for these materials permits employing soft x-ray (930.3 eV) standing wave (SW) excitation in photoemission that yields atomic layer-by-layer depth resolution of these properties. Applying SW photoemission to Bi 2Sr 2CaCu 2O 8+δ yields the depth distribution of atomic composition and the layer-resolved densities of states. We detect significant Ca presence in the SrO layers and oxygen bonding to three different cations. The layer-resolved valence electronic structure is found to be strongly influenced by the atomic supermodulation structure, as determined by comparison to density functional theory calculations, by Ca-Sr intermixing, and by correlation effects associated with the Cu 3 d-3 d Coulomb interaction, further clarifying the complex interactions in this prototypical cuprate. Here, measurements of this type for other quasi-two-dimensional materials with large c represent a promising future direction.

Authors:
 [1];  [1];  [1];  [2];  [3];  [3];  [3];  [3];  [3];  [4];  [5];  [5];  [5];  [6];  [7];  [2];  [8];  [9];  [1]
  1. Univ. of California, Davis, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Univ. of California, Davis, CA (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Peter Grünberg Institut PGI-6, Julich (Germany)
  5. Synchrotron SOLEIL, Gif-sur-Yvette (France)
  6. Univ. Paris-Sud, Orsay Cedex (France)
  7. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moscow (Russia)
  8. Univ. Paris-Sud, Univ. Paris-Saclay, Orsay Cedex (France)
  9. UR1 CNRS/Synchrotron SOLEIL, Gif sur Yvette (France)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1563967
Alternate Identifier(s):
OSTI ID: 1478598
Grant/Contract Number:  
AC02-05CH11231; SC0014697; NA0002908; FG02-04ER46111
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 98; Journal Issue: 15; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Kuo, Cheng-Tai, Lin, Shih-Chieh, Conti, Giuseppina, Pi, Shu-Ting, Moreschini, Luca, Bostwick, Aaron, Meyer-Ilse, Julia, Gullikson, Eric, Kortright, Jeffrey B., Nemšák, Slavomír, Rault, Julien E., Le Fèvre, Patrick, Bertran, François, Santander-Syro, Andrés F., Vartanyants, Ivan A., Pickett, Warren E., Saint-Martin, Romuald, Taleb-Ibrahimi, Amina, and Fadley, Charles S. Atomic-layer-resolved composition and electronic structure of the cuprate Bi2Sr2CaCu2O8+δ from soft x-ray standing-wave photoemission. United States: N. p., 2018. Web. doi:10.1103/physrevb.98.155133.
Kuo, Cheng-Tai, Lin, Shih-Chieh, Conti, Giuseppina, Pi, Shu-Ting, Moreschini, Luca, Bostwick, Aaron, Meyer-Ilse, Julia, Gullikson, Eric, Kortright, Jeffrey B., Nemšák, Slavomír, Rault, Julien E., Le Fèvre, Patrick, Bertran, François, Santander-Syro, Andrés F., Vartanyants, Ivan A., Pickett, Warren E., Saint-Martin, Romuald, Taleb-Ibrahimi, Amina, & Fadley, Charles S. Atomic-layer-resolved composition and electronic structure of the cuprate Bi2Sr2CaCu2O8+δ from soft x-ray standing-wave photoemission. United States. doi:10.1103/physrevb.98.155133.
Kuo, Cheng-Tai, Lin, Shih-Chieh, Conti, Giuseppina, Pi, Shu-Ting, Moreschini, Luca, Bostwick, Aaron, Meyer-Ilse, Julia, Gullikson, Eric, Kortright, Jeffrey B., Nemšák, Slavomír, Rault, Julien E., Le Fèvre, Patrick, Bertran, François, Santander-Syro, Andrés F., Vartanyants, Ivan A., Pickett, Warren E., Saint-Martin, Romuald, Taleb-Ibrahimi, Amina, and Fadley, Charles S. Mon . "Atomic-layer-resolved composition and electronic structure of the cuprate Bi2Sr2CaCu2O8+δ from soft x-ray standing-wave photoemission". United States. doi:10.1103/physrevb.98.155133. https://www.osti.gov/servlets/purl/1563967.
@article{osti_1563967,
title = {Atomic-layer-resolved composition and electronic structure of the cuprate Bi2Sr2CaCu2O8+δ from soft x-ray standing-wave photoemission},
author = {Kuo, Cheng-Tai and Lin, Shih-Chieh and Conti, Giuseppina and Pi, Shu-Ting and Moreschini, Luca and Bostwick, Aaron and Meyer-Ilse, Julia and Gullikson, Eric and Kortright, Jeffrey B. and Nemšák, Slavomír and Rault, Julien E. and Le Fèvre, Patrick and Bertran, François and Santander-Syro, Andrés F. and Vartanyants, Ivan A. and Pickett, Warren E. and Saint-Martin, Romuald and Taleb-Ibrahimi, Amina and Fadley, Charles S.},
abstractNote = {A major remaining challenge in the superconducting cuprates is the unambiguous differentiation of the composition and electronic structure of the CuO2 layers and those of the intermediate layers. The large c axis for these materials permits employing soft x-ray (930.3 eV) standing wave (SW) excitation in photoemission that yields atomic layer-by-layer depth resolution of these properties. Applying SW photoemission to Bi2Sr2CaCu2O8+δ yields the depth distribution of atomic composition and the layer-resolved densities of states. We detect significant Ca presence in the SrO layers and oxygen bonding to three different cations. The layer-resolved valence electronic structure is found to be strongly influenced by the atomic supermodulation structure, as determined by comparison to density functional theory calculations, by Ca-Sr intermixing, and by correlation effects associated with the Cu 3d-3d Coulomb interaction, further clarifying the complex interactions in this prototypical cuprate. Here, measurements of this type for other quasi-two-dimensional materials with large c represent a promising future direction.},
doi = {10.1103/physrevb.98.155133},
journal = {Physical Review B},
number = 15,
volume = 98,
place = {United States},
year = {2018},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

FIG. 1 FIG. 1: Spatial relationship between the Bi2Sr2CaCu2O8+$δ$ (Bi2212) crystal planes and the (002) Bragg-reflection x-ray standing wave (SW). (a) Top half of the unit cell of Bi2212. (b) Schematic of the experimental geometry and the SW generated by the Bi2212 (002) reflection, with wavelength = $λ$SW = c/2 = d002.more » The incident and diffracted waves (associated with wave vectors $k$0 and $k$002) interfere to produce the SW. The photon energy was 930.3 eV, with a corresponding Bragg angle of about 25.7°. (c) By increasing the incidence angle around the (002) Bragg reflection, the SW can be shifted by d002/2. The maximum of the SW electric field intensity can thus be shifted continuously from the Ca plane (b) to the BiO plane (c).« less

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    Works referencing / citing this record:

    Atomic-layer-resolved composition and electronic structure of the cuprate $\mathrm{Bi_{2}Sr_{2}CaCu_{2}O_{8+δ}}$ from soft x-ray standing-wave photoemission
    text, January 2018

    • Kuo, Cheng-Tai; Lin, Shih-Chieh; Conti, Giuseppina
    • Deutsches Elektronen-Synchrotron, DESY, Hamburg
    • DOI: 10.3204/pubdb-2019-00315