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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

Journal Article · · Physical Review B
 [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)
+ Show Author Affiliations

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.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231; SC0014697; NA0002908; FG02-04ER46111
OSTI ID:
1563967
Alternate ID(s):
OSTI ID: 1478598
Journal Information:
Physical Review B, Vol. 98, Issue 15; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 5 works
Citation information provided by
Web of Science

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Figures / Tables (14)

FIG. 1(p. 16)figure FIG. 1
FIG. 2(p. 17)figure FIG. 2
FIG. 3(p. 18)figure FIG. 3
FIG. 4(p. 19)figure FIG. 4
FIG. 5(p. 20)figure FIG. 5
FIG. S1(p. 26)figure FIG. S1
FIG. S2(p. 27)figure FIG. S2
FIG. S3(p. 29)figure FIG. S3
Supplemental Table S1(p. 32)figure Supplemental Table S1
Supplemental Table S2(p. 34)figure Supplemental Table S2
FIG. S4(p. 35)figure FIG. S4
Supplemental Table S3(p. 36)figure Supplemental Table S3
Supplemental Table S4(p. 36)figure Supplemental Table S4
FIG. S5(p. 37)figure FIG. S5

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