Abstract
We have measured the thermopower across the metamagnetic transition of the heavy fermion compound CeRuSi 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.
- Received 7 December 2011
DOI:https://doi.org/10.1103/PhysRevB.85.035127
©2012 American Physical Society