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Письма в Журнал экспериментальной и теоретической физики, 2008, том 88, выпуск 2, страницы 155–160
(Mi jetpl179)
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Эта публикация цитируется в 114 научных статьях (всего в 114 статьях)
КОНДЕНСИРОВАННЫЕ СРЕДЫ
Electronic structure of prototype AFe$_2$As$_2$ and ReOFeAs high-temperature superconductors: a comparison
I. A. Nekrasova, Z. V. Pchelkinab, M. V. Sadovskiia a Institute for Electrophysics, Russian Academy of Sciences, Ural Division, Yekaterinburg, 620016, Russia
b Institute for Metal Physics, Russian Academy of Sciences, Ural Division, GSP-170, Yekaterinburg, 620041, Russia
Аннотация:
We have performed ab initio LDA calculations of electronic structure of newly discovered prototype high-temperature superconductors AFe$_2$As$_2$ (A=Ba,Sr) and compared it with previously calculated electronic spectra of ReOFeAs (Re=La,Ce,Pr,Nd,Sm). In all cases we obtain almost identical densities of states in rather wide energy interval (up to 1 eV) around the Fermi level. Energy dispersions are also very similar and almost two-dimensional in this energy interval, leading to the same basic (minimal) model of electronic spectra, determined mainly by Fe $d$-orbitals of FeAs layers. The other constituents, such as A ions or rare earths Re (or oxygen states) are more or less irrelevant for superconductivity. LDA Fermi surfaces for AFe$_2$As$_2$ are also very similar to that of ReOFeAs. This makes the more simple AFe$_2$As$_2$ a generic system to study high-temperature superconductivity in FeAs – layered compounds.
Поступила в редакцию: 17.06.2008
Образец цитирования:
I. A. Nekrasov, Z. V. Pchelkina, M. V. Sadovskii, “Electronic structure of prototype AFe$_2$As$_2$ and ReOFeAs high-temperature superconductors: a comparison”, Письма в ЖЭТФ, 88:2 (2008), 155–160; JETP Letters, 88:2 (2008), 144–149
Образцы ссылок на эту страницу:
https://www.mathnet.ru/rus/jetpl179 https://www.mathnet.ru/rus/jetpl/v88/i2/p155
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