Fermi surface and effective masses in photoemission response of the (Ba1−xKx)Fe2As2 superconductor
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F17%3A43932486" target="_blank" >RIV/49777513:23640/17:43932486 - isvavai.cz</a>
Result on the web
<a href="http://hdl.handle.net/11025/29262" target="_blank" >http://hdl.handle.net/11025/29262</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/s41598-017-09480-y" target="_blank" >10.1038/s41598-017-09480-y</a>
Alternative languages
Result language
angličtina
Original language name
Fermi surface and effective masses in photoemission response of the (Ba1−xKx)Fe2As2 superconductor
Original language description
The angle-resolved photoemission spectra of the superconductor (Ba1−xKx)Fe2As2 have been investigated accounting coherently for spin-orbit coupling, disorder and electron correlation effects in the valence bands combined with final state, matrix element and surface effects. Our results explain the previously obscured origins of all salient features of the ARPES response of this paradigm pnictide compound and reveal the origin of the Lifshitz transition. Comparison of calculated ARPES spectra with the underlying DMFT band structure shows an important impact of final state effects, which result for three-dimensional states in a deviation of the ARPES spectra from the true spectral function. In particular, the apparent effective mass enhancement seen in the ARPES response is not an entirely intrinsic property of the quasiparticle valence bands but may have a significant extrinsic contribution from the photoemission process and thus differ from its true value. Because this effect is more pronounced for low photoexcitation energies, soft-X-ray ARPES delivers more accurate values of the mass enhancement due to a sharp definition of the 3D electron momentum. To demonstrate this effect in addition to the theoretical study, we show here new state of the art soft-X-ray and polarisation dependent ARPES measurments.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
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Continuities
O - Projekt operacniho programu
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Scientific Reports
ISSN
2045-2322
e-ISSN
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Volume of the periodical
7
Issue of the periodical within the volume
AUG 18 2017
Country of publishing house
GB - UNITED KINGDOM
Number of pages
8
Pages from-to
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UT code for WoS article
000407980000041
EID of the result in the Scopus database
2-s2.0-85027885095