Spin-gap effect on resistivity in the t-J model

Details Spin-gap effect on resistivity in the t-J model Spin-gap effect on resistivity in the t-J model

1999-03-16

arxiv.org/abs/cond-mat/9903243v2

J. Phys. Soc. Jpn. 69, 3497 (2000)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, REVTeX format, 2 eps-figures

Scientific paper

10.1143/JPSJ.69.3497

We calculate the spin-gap effect on dc resistivity in the t-J model of high-$T_{\rm c}$ cuprates by using the Ginzburg-Landau theory coupled with a gauge field as its effective field theory to get $\rho(T) \propto T \{1-c\:(T^* -T)^d \}$, where $T^*$ is the spin-gap onset temperature. By taking the compactness of massive gauge field into account, the exponent $d$ deviates from its mean-field value 1/2 and becomes a nonuniversal $T$-dependent quantity, which improves the correspondence with the experiments.

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