Seebeck coefficient in skewed non-Fermi liquids: application to Nd-LSCO

A. Georges1 and J. Mravlje2

1Collège de France, 11 place Marcelin Berthelot, 75005 Paris, France,
Center for Computational Quantum Physics, Flatiron Institute, 162 5th Avenue, New York
CPHT, CNRS, Ecole Polytechnique, IP Paris, F-91128 Palaiseau, France
DQMP, Université de Genève, 24 quai Ernest Ansermet, CH-1211 Genève, Switzerland

2Jozef Stefan Institute, Jamova 39,SI-1000 Ljubljana, Slovenia

We consider thermoelectric transport in correlated metals with disorder within a simple phenomenological approach. We allow for a particle-hole asymmetry in the inelastic scattering rate. We find that the effects of this asymmetry disappear at low temperatures in Fermi liquids (where electronic contribution to resistivity ρ~ T2) but not in non-Fermi liquids (ρ~ Tν; ν≤1), which can lead to changes of sign of the Seebeck coefficient at low temperatures with respect to that found in a band theory. We apply the theory [1] to recent measurements of thermoelectric transport in Nd-LSCO cuprate close to the pseudo-gap ending point [2] and show that both the inplane and outofplane measured resistivity and the Seebeck coefficient are consistently described.

1. A. Georges and J. Mravlje, Phys. Rev. Research 3, 043132 (2021).
2. A. Gourgot et al., arXiv:2106.05959

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