Violation of Ioffe-Regel condition but saturation of resistivity of the high Tc cuprates

Details Violation of Ioffe-Regel condition but saturation of resistivity of the high Tc cuprates Violation of Ioffe-Regel condition but saturation of resistivity of the high Tc cuprates

2002-10-24

arxiv.org/abs/cond-mat/0210543v1

Europhys. Lett. 61, 88 (2003)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, RevTeX, 2 eps figures, additional material available at http://www.mpi-stuttgart.mpg.de/andersen/saturation/

Scientific paper

10.1209/epl/i2003-00253-5

We demonstrate that the resistivity data of a number of high Tc cuprates, in particular La(2-x)SrxCuO4, are consistent with resistivity saturation, although the Ioffe-Regel condition is strongly violated. By using the f-sum rule together with calculations of the kinetic energy in the t-J model, we show that the saturation resistivity is unusually large. This is related to the strong reduction of the kinetic energy due to strong correlation effects. The fulfilment of the Ioffe-Regel condition for conventional transition metal compounds is found to be somewhat accidental.

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