Bond stretching phonon softening and isotope effect in a phenomenological model for cuprate superconductors
نویسندگان
چکیده
منابع مشابه
Unified picture of the oxygen isotope effect in cuprate superconductors.
High-temperature superconductivity in cuprates was discovered almost exactly 20 years ago, but a satisfactory theoretical explanation for this phenomenon is still lacking. The isotope effect has played an important role in establishing electron-phonon interaction as the dominant interaction in conventional superconductors. Here we present a unified picture of the oxygen isotope effect in cuprat...
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Quasiparticle dynamics of FeSe single crystals revealed by dual-color transient reflectivity measurements (ΔR/R) provides unprecedented information on Fe-based superconductors. The amplitude of the fast component in ΔR/R clearly gives a competing scenario between spin fluctuations and superconductivity. Together with the transport measurements, the relaxation time analysis further exhibits anom...
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Using an advanced molecular beam epitaxy system, we have reproducibly synthesized atomically smooth films of high-temperature superconductors and uniform trilayer junctions with virtually perfect interfaces. We found that supercurrent runs through very thick barriers. We can rule out pinholes and microshorts; this "giant proximity effect" (GPE) is intrinsic. It defies the conventional explanati...
متن کاملOxygen-isotope effect on the in-plane penetration depth in cuprate superconductors
Muon-spin rotation (μSR) studies of the oxygen isotope (O/O) effect (OIE) on the in-plane magnetic field penetration depth λab in cuprate high-temperature superconductors (HTS) are presented. First, the doping dependence of the OIE on the transition temperature Tc in various HTS is briefly discussed. It is observed that different cuprate families show a similar doping dependence of the OIE on T...
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We review some aspects of the isotope effect (IE) in superconductors. Our focus is on the influence of factors not related to the pairing mechanism. After summarizing the main results obtained for conventional superconductors, we review the effect of magnetic impurities, the proximity effect and non-adiabaticity on the value of the isotope coefficient (IC). We discuss the isotope effect of Tc a...
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ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2010
ISSN: 1742-6596
DOI: 10.1088/1742-6596/200/1/012022