Polaronic signatures in the optical properties of the electron-doped cuprate superconductor Nd2–xCexCuO4
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Microwave Electrodynamics of the Electron-Doped Cuprate Superconductors Pr2−xCexCuO4−y and Nd2−xCexCuO4−y
The pairing state symmetry of the electron-doped cuprate superconductors is thought to be s-wave in nature, in contrast with their hole-doped counterparts which exhibit a d-wave symmetry. We re-examine this issue based on recent improvements in our electron-doped materials and our measurement techniques. We report microwave cavity perturbation measurements of the temperature dependence of the p...
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We report on the study of the Fermi surface of the electrondoped cuprate superconductor Nd2−xCexCuO4 by measuring the interlayer magnetoresistance as a function of the strength and orientation of the applied magnetic field. We performed experiments in both steady and pulsed magnetic fields on high-quality single crystals with Ce concentrations of x = 0.13–0.17. In the overdoped regime of x > 0....
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We report neutron scattering studies on two single crystal samples of the electron-doped (n-type) superconducting (SC) cuprate Nd2-xCexCuO4 (x=0.15) with T(c)=18 and 25 K. Unlike the hole-doped (p-type) SC cuprates, where incommensurate magnetic fluctuations commonly exist, the n-type cuprate shows commensurate magnetic fluctuations at the tetragonal (1/2 1/2 0) reciprocal points both in the SC...
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We present conductance-voltage (G − V ) data for point contact junctions between a normal metal and the electron doped cuprate superconductor Pr2−xCexCuO4 (PCCO). We observe a zero bias conductance peak (ZBCP) for the under-doped composition of this cuprate (x = 0.13) which is consistent with d-wave pairing symmetry. For optimally-doped (x = 0.15) and over-doped (x = 0.17) PCCO, we find that th...
متن کاملAngle-resolved photoemission spectroscopy of electron-doped cuprate superconductors: isotropic electron-phonon coupling.
We have performed high resolution angle-resolved photoemission (ARPES) studies on electron-doped cuprate superconductors Sm2-xCexCuO4 (x=0.10, 0.15, 0.18), Nd2-xCexCuO4 (x=0.15), and Eu2-xCexCuO4 (x=0.15). Imaginary parts of the electron removal self energy show steplike features due to an electron-bosonic mode coupling. The steplike feature is seen along both nodal and antinodal directions but...
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تاریخ انتشار 2017