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@article{748303,
author = {Chaloupka, Jiří and Khaliullin, Giniyat},
article_location = {USA},
article_number = {25},
keywords = {strongly correlated electron systems; photoemission spectra; layered cobaltates; spin-polaron},
language = {eng},
issn = {0031-9007},
journal = {Physical Review Letters},
title = {Spin Polaron Theory for the Photoemission Spectra of Layered Cobaltates},
volume = {99},
year = {2007}
}
TY - JOUR
ID - 748303
AU - Chaloupka, Jiří - Khaliullin, Giniyat
PY - 2007
TI - Spin Polaron Theory for the Photoemission Spectra of Layered Cobaltates
JF - Physical Review Letters
VL - 99
IS - 25
SP - 256406
EP - 256406
PB - The Americal Physical Society
SN - 00319007
KW - strongly correlated electron systems
KW - photoemission spectra
KW - layered cobaltates
KW - spin-polaron
N2 - Recently, strong reduction of the quasiparticle peaks and pronounced incoherent structures have been observed in the photoemission spectra of layered cobaltates. Surprisingly, these many-body effects are found to increase near the band insulator regime. We explain these unexpected observations in terms of a novel spin-polaron model for CoO2 planes which is based on a fact of the spin-state quasidegeneracy of Co3+ ions in oxides. Scattering of the photoholes on spin-state fluctuations suppresses their coherent motion. The observed peak-dip-hump type lineshapes are well reproduced by the theory.
ER -
CHALOUPKA, Jiří a Giniyat KHALIULLIN. Spin Polaron Theory for the Photoemission Spectra of Layered Cobaltates. \textit{Physical Review Letters}. USA: The Americal Physical Society, 2007, roč.~99, č.~25, s.~256406-256409. ISSN~0031-9007.
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