Giant Nernst effect in the incommensurate charge density wave state of P4W12O44

Kamil K. Kolincio (1, 2) , Ramzy Daou (2) , Olivier Perez (2) , Laurent Guérin (3) , Pierre Fertey (4) , Alain Pautrat (2)

1 GUT - Gdańsk University of Technology
2 CRISMAT - Laboratoire de cristallographie et sciences des matériaux
3 IPR - Institut de Physique de Rennes
4 SSOLEIL - Synchrotron SOLEIL

We report the study of Nernst effect in quasi-low-dimensional tungsten bronze P4W12O44 showing a sequence of Peierls instabilities. We demonstrate that both condensation of the electronic carriers in the charge density wave state and the existence of high-mobility electrons and holes originating from the small pockets remaining in the incompletely nested Fermi surface give rise to a Nernst effect of a magnitude similar to that observed in heavy fermion compounds.

Keywords: Monophosphate tungsten bronze; Magnetotransport; Instabilities; Thermopower; Transport; Charge density waves; Nernst effect; 2-dimensional systems; Crystal structures; Resistivity measurements; X-ray diffraction

Domains: Physics [physics]

Kamil K. Kolincio, Ramzy Daou, Olivier Perez, Laurent Guérin, Pierre Fertey, et al.. Giant Nernst effect in the incommensurate charge density wave state of P4W12O44. Physical Review B, 2016, 94 (24), pp.241118(R). ⟨10.1103/PhysRevB.94.241118⟩. ⟨hal-01481021⟩