Thermoelectric transport across the metamagnetic transition of CeRu2Si2

Details Thermoelectric transport across the metamagnetic transition of CeRu2Si2 Thermoelectric transport across the metamagnetic transition of CeRu2Si2

2011-10-06

arxiv.org/abs/1110.1160v2

Phys. Rev. B 85 (2012) 035127

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 4 figures

Scientific paper

10.1103/PhysRevB.85.035127

We have measured the thermopower across the metamagnetic transition of the heavy fermion compound CeRu2Si2 at temperatures down to 0.1K and magnetic fields up to 11.5T. We find a large negative enhancement of the thermopower on crossing the metamagnetic field, as well as a sudden change in slope. We argue that this is consistent with the Zeeman-driven deformation of the Fermi surface through a topological transition. The field dependence of the thermopower highlights the discrepancy between thermodynamic and transport properties across the metamagnetic transition.

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