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Consistent explanations of tunneling and photoemission data in cuprate superconductors: No evidence for magnetic pairing

We have analyzed scanning tunneling spectra of two electron-doped cuprates Pr0.88LaCe0.12CuO4 (Tc = 21 K and 24 K) and compared them with tunneling spectrum of hole-doped La1.84Sr0.16CuO4 and effective electron-boson spectral function of hole-doped La1.97Sr0.03CuO4 (extracted from angle-resolved photoemission spectrum). We have also analyzed tunneling spectra and angle-resolved photoemission spectra for hole-doped Bi2Sr2CaCu2O8. These results unambiguously rule out magnetic pairing mechanism in both electron- and hole-doped cuprates and support polaronic/bipolaronic superconductivity in hole-doped Bi2Sr2CaCu2O8.

preprint2013arXivOpen access
Guo-meng ZhaoA. S. Alexandrov
cond-mat.supr-con
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Guo-meng ZhaoA. S. Alexandrov

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