Anomalous temperature behavior of resistivity in lightly doped manganites around a metal-insulator phase transition

Details Anomalous temperature behavior of resistivity in lightly doped manganites around a metal-insulator phase transition Anomalous temperature behavior of resistivity in lightly doped manganites around a metal-insulator phase transition

1999-09-14

arxiv.org/abs/cond-mat/9909196v1

JETP Lett. 70, 473 (1999)

Physics

Condensed Matter

Strongly Correlated Electrons

10 REVTEX pages, 2 PostScript figures (epsf.sty); to be published in JETP Letters

Scientific paper

10.1134/1.568200

An unusual temperature and concentration behavior of resistivity in $La_{0.7}Ca_{0.3}Mn_{1-x}Cu_xO_3$ has been observed at slight $Cu$ doping ($0\leq x \leq 0.05$). Namely, introduction of copper results in a splitting of the resistivity maximum around a metal-insulator transition temperature $T_0(x)$ into two differently evolving peaks. Unlike the original $Cu$-free maximum which steadily increases with doping, the second (satellite) peak remains virtually unchanged for $x

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