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@ARTICLE{Kuo:859706,
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 Nemsak, Slavomir 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.},
title = {{A}tomic-layer-resolved composition and electronic
structure of the cuprate {B} i 2 {S} r 2 {C}a{C} u 2 {O} 8 +
δ from soft x-ray standing-wave photoemission},
journal = {Physical review / B},
volume = {98},
number = {15},
issn = {2469-9950},
address = {Woodbury, NY},
publisher = {Inst.},
reportid = {FZJ-2019-00543},
pages = {155133},
year = {2018},
abstract = {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.
Measurements of this type for other quasi-two-dimensional
materials with large c represent a promising future
direction.},
cin = {PGI-6},
ddc = {530},
cid = {I:(DE-Juel1)PGI-6-20110106},
pnm = {522 - Controlling Spin-Based Phenomena (POF3-522)},
pid = {G:(DE-HGF)POF3-522},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000447721300001},
doi = {10.1103/PhysRevB.98.155133},
url = {https://juser.fz-juelich.de/record/859706},
}