Physics – Condensed Matter – Superconductivity
Scientific paper
1999-12-23
Physica C 341-348, 1779 (2000)
Physics
Condensed Matter
Superconductivity
M2S-HTSC-VI Conference paper (2 pages, 2 figures), using Elsevier style espcrc2.sty
Scientific paper
10.1016/S0921-4534(00)01037-6
We have measured the ab-plane resistivity of La$_{2-x}$Sr$_x$CuO$_4$ single crystals with small Sr content (x=0.052 $\div$ 0.075) between 4.2 and 300 K by using the AC Van der Pauw technique. As recently suggested by Ichikawa et al., the deviation from the linearity of the $\rho_{\mathrm{ab}}(T)$ curve starting at a temperature T$_{\mathrm{ch}}$ can be interpreted as due to a progressive slowing down of the fluctuations of pre-formed charge stripes. An electronic transition of the stripes to a more ordered phase could instead be responsible for some very sharp anomalies present in the $\rho_{\mathrm{ab}}(T)$ of superconducting samples just above $T_{\mathrm{c}}$.
Daghero Dario
Gonnelli Renato S.
Licci Francesca
Morello Andrea
Stepanov Alexander V.
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