Thermoelectric transport across the metamagnetic transition of CeRu 2Si 2

Heike Pfau, Ramzy Daou, Manuel Brando, Frank Steglich

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Abstract

We have measured the thermopower across the metamagnetic transition of the heavy fermion compound CeRu 2Si 2 at temperatures down to 0.1 K and magnetic fields up to 11.5 T. 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.

Original languageEnglish (US)
Article number035127
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number3
DOIs
StatePublished - Jan 30 2012

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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