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Article
Impurity effects on electron–mode coupling in high-temperature superconductors
Despite years of intensive research on copper oxide superconductors with high transition temperatures (Tc), the driving force of superconductivity has not yet been clarified. Angle-resolved photoemission spectros...
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Article
High-resolution laser spectroscopy of ultracold ytterbium atoms using spin-forbidden electric quadrupole transition
We have successfully observed high-resolution spectra of spin-forbidden electric quadrupole transition (1 S 0→3 D 2)...