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Continuously Doping Bi2Sr2CaCu2O8+δ into Electron-Doped Superconductor by CaH2 Annealing Method 下载免费PDF全文
As a typical hole-doped cuprate superconductor, Bi2Sr2CaCu2O8+δ(Bi2212) carrier doping is mostly determined by its oxygen content. Traditional doping methods can regulate its doping level within the range of hole doping.Here we report the first application of CaH2 annealing method in regulating the doping level of Bi2212. By continuously controlling the anneal time, a series of differently doped samples can be obtained. The combined experime... 相似文献
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Hybridization Effects Revealed by Angle-Resolved Photoemission Spectroscopy in Heavy-Fermion Ce_2IrIn_8 下载免费PDF全文
We utilize high-resolution resonant angle-resolved photoemission spectroscopy(ARPES)to study the band structure and hybridization effect of the heavy-fermion compound Ce_2 IrIn_8.We observe a nearly flat band at the binding energy of 7 meV below the coherent temperature T_(coh)~40 K,which characterizes the electrical resistance maximum and indicates the onset temperature of hybridization.However,the Fermi vector and the Fermi surface volume have little change around T_(coh),which challenges the widely believed evolution from a hightemperature small Fermi surface to a low-temperature large Fermi surface.Our experimental results of the band structure fit well with the density functional theory plus dynamic mean-field theory calculations. 相似文献
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