Absence of strong correlation in Li 2 Pd 3 B
Absence of strong correlation in Li 2 Pd 3 B
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Li 2 Pd 3 B 不存在强相关性
DOI：
10.1103/physrevb.71.092507
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发表时间：
2005
影响因子：
3.7
通讯作者：
K. Togano
中科院分区：
文献类型：
--
作者：
T. Yokoya;T. Muro;I. Hase;H. Takeya;K. Hirata;K. Togano
We use x-ray photoemission spectroscopy to study the electronic structure of new superconductor ${\mathrm{Li}}_{2}{\mathrm{Pd}}_{3}\mathrm{B}$. Binding energies of the $\mathrm{Pd}$ $3p$ and $3d$ indicate valency that is intermediate between $\mathrm{Pd}$ metal $(0\ifmmode\pm\else\textpm\fi{})$ and $\mathrm{PdO}(2+)$, or effectively $\mathrm{Pd}$ ${4d\phantom{\rule{0.2em}{0ex}}}^{9}$ configuration. Comparison of satellite features in core level spectra of ${\mathrm{Li}}_{2}{\mathrm{Pd}}_{3}\mathrm{B}$ with that of $\mathrm{PdO}$ suggests that a larger hybridization strength of ${\mathrm{Li}}_{2}{\mathrm{Pd}}_{3}\mathrm{B}$ than that of $\mathrm{PdO}$. The valence band spectrum is in excellent agreement with first principle band structure calculations, allowing us to ascribe the states at the Fermi level responsible for the superconductivity to be mainly $\mathrm{Pd}$ $4d$ hybridized with $\mathrm{B}$ $2p$ and $\mathrm{Li}$ $2p$. These observations indicate that correlation effects play a negligible role for the physical properties of the new superconductor.
We use x-ray photoemission spectroscopy to study the electronic structure of new superconductor ${\mathrm{Li}}_{2}{\mathrm{Pd}}_{3}\mathrm{B}$. Binding energies of the $\mathrm{Pd}$ $3p$ and $3d$ indicate valency that is intermediate between $\mathrm{Pd}$ metal $(0\ifmmode\pm\else\textpm\fi{})$ and $\mathrm{PdO}(2+)$, or effectively $\mathrm{Pd}$ ${4d\phantom{\rule{0.2em}{0ex}}}^{9}$ configuration. Comparison of satellite features in core level spectra of ${\mathrm{Li}}_{2}{\mathrm{Pd}}_{3}\mathrm{B}$ with that of $\mathrm{PdO}$ suggests that a larger hybridization strength of ${\mathrm{Li}}_{2}{\mathrm{Pd}}_{3}\mathrm{B}$ than that of $\mathrm{PdO}$. The valence band spectrum is in excellent agreement with first principle band structure calculations, allowing us to ascribe the states at the Fermi level responsible for the superconductivity to be mainly $\mathrm{Pd}$ $4d$ hybridized with $\mathrm{B}$ $2p$ and $\mathrm{Li}$ $2p$. These observations indicate that correlation effects play a negligible role for the physical properties of the new superconductor.
DOI：
10.1007/bf01303701
发表时间：
1986-01-01
期刊：
ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER
影响因子：
--
作者：
BEDNORZ, JG;MULLER, KA
通讯作者：
MULLER, KA