Starting with an exact expression for the quasiparticle decay rate due to the phonon-mediated electron-electron interaction, we derive a simple approximate formula for the magnitude of its T² coefficient at low temperatures. Comparison with measured decay rates in Cd and several nonmagnetic transition metals yields agreement to within at worst a factor of 2. Similar agreement holds for estimated electrical resistivities.
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Schwartzman et al. (1993) studied this question.
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