Physics – Condensed Matter – Superconductivity
Scientific paper
2007-05-11
JETP Letters 85, 592 (2007)
Physics
Condensed Matter
Superconductivity
6 pages (REVTEX4), 2 EPS figures; accepted for publication in JETP Letters
Scientific paper
10.1134/S0021364007110148
A pronounced step-like (kink) behavior in the temperature dependence of resistivity $\rho (T)$ is observed in the optimally-doped $Sm_{1.85}Ce_{0.15}CuO_4$ thin films around $T_{sf}=87K$ and attributed to manifestation of strong spin fluctuations induced by $Sm^{3+}$ moments with the energy $\hbar \omega_{sf}=k_BT_{sf}\simeq 7meV$. In addition to fluctuation induced contribution $\rho_{sf}(T)$ due to thermal broadening effects (of the width $\omega_{sf}$), the experimental data are found to be well fitted accounting for residual (zero-temperature) $\rho_{res}$, electron-phonon $\rho _{e-ph}(T)=AT$ and electron-electron $\rho_{e-e}(T)=BT^2$ contributions. The best fits produced $\omega_p=2.1meV$, $\tau_0^{-1}=9.5\times 10^{-14}s^{-1}$, $\lambda =1.2$, and $E_F=0.2eV$ for estimates of the plasmon frequency, the impurity scattering rate, electron-phonon coupling constant, and the Fermi energy, respectively.
Araujo-Moreira Fernando M.
Lanfredi A. J. C.
Sergeenkov Sergei
No associations
LandOfFree
Possible manifestation of spin fluctuations in the temperature behavior of resistivity in Sm_{1.85}Ce_{0.15}CuO_4 thin films does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Possible manifestation of spin fluctuations in the temperature behavior of resistivity in Sm_{1.85}Ce_{0.15}CuO_4 thin films, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Possible manifestation of spin fluctuations in the temperature behavior of resistivity in Sm_{1.85}Ce_{0.15}CuO_4 thin films will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-411465