ab-plane resistivity and possible charge stripe ordering in strongly underdoped La$_{2-x}$Sr$_{x}$CuO$_{4}$ single crystals

• Main Authors: Gonnelli, R. S, Stepanov, V. A, Morello, A, Ummarino, G. A, Daghero, D, Licci, F, Ubertalli, G
• Format: Journal Article
• Language: English
• Published: 23.12.1999
• Subjects: Physics - Strongly Correlated Electrons; Physics - Superconductivity
• DOI: 10.48550/arxiv.cond-mat/9912434

Physica C 341-348, 1779 (2000) 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 $T_{\mathrm{c}}$.