Umklapp scattering from spin fluctuations in Copper-Oxides

Details Umklapp scattering from spin fluctuations in Copper-Oxides Umklapp scattering from spin fluctuations in Copper-Oxides

1995-05-16

arxiv.org/abs/cond-mat/9505067v2

Physics

Condensed Matter

replaced by LaTeX file (due to problems with PostScript)

Scientific paper

10.1103/PhysRevB.52.R7038

The $\mathbf k$-dependent electronic momentum relaxation rate due to Umklapp scattering from antiferromagnetic spin fluctuations is studied within a renormalized mean-field approach to an extended $t-J$ model appropriate to YBa$_2$Cu$_3$O$_{7-x}$ and other cuprates. Transport coefficients are calculated in a relaxation time approximation. We compare these results with those obtained with the phenomenological assumption that all scattering processes dissipate momentum. We show that the latter, which violates momentum conservation, leads to quite different magnitudes and temperature dependences of resistivities and Hall coefficients.

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