Abstract
CeRu 2Si 2 and CeRh 2Si 2 are two similar heavy fermion stoichiometric compounds located on the two sides of a magnetic quantum critical phase transition. CeRh 2Si 2 is an antiferromagnet below T N=36K with moderate electronic masses whereas CeRu 2Si 2 is a paramagnetic metal with particularly heavy electrons. Here we present tunneling spectroscopy measurements as a function of temperature (from 0.15 to 45K). The tunneling conductance at 0.15K reveals V-shaped dips around the Fermi level in both compounds, which disappear in CeRu 2Si 2 above the coherence temperature, and in CeRh 2Si 2 above the Néel temperature. In the latter case, two different kinds of V-shaped tunneling conductance dips are found.
| Original language | English |
|---|---|
| Article number | 475602 |
| Journal | Journal of Physics Condensed Matter |
| Volume | 24 |
| Issue number | 47 |
| DOIs | |
| Publication status | Published - 2012 Nov 28 |
| Externally published | Yes |
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
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Maldonado, A., Suderow, H., Vieira, S., Aoki, D., & Flouquet, J. (2012). Temperature dependent tunneling spectroscopy in the heavy fermion CeRu 2Si 2 and in the antiferromagnet CeRh 2Si 2 Journal of Physics Condensed Matter, 24(47), [475602]. https://doi.org/10.1088/0953-8984/24/47/475602