2012/10/15 by A. Maldonado, Hermann Suderow, H. Suderow +5
Chemistry · Materials Science · Physics and Astronomy · #Antiferromagnetism #Condensed matter physics #Heavy fermion #Inorganic Chemistry and Materials #Iron-based superconductors research #Materials science #Physics #Quantum mechanics #Quantum tunnelling #Rare-earth and actinide compounds #Spectroscopy #Superconductivity #cond-mat.str-el
paper · pdf · doi:10.1088/0953-8984/24/47/475602
arxiv created 2012/10/15 · openalex publication_date 2012/10/31 · arxiv updated 2015/06/11 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
CeRu(2)Si(2) and CeRh(2)Si(2) are two similar heavy fermion stoichiometric compounds located on the two sides of a magnetic quantum critical phase transition. CeRh(2)Si(2) is an antiferromagnet below T(N) = 36 K with moderate electronic masses whereas CeRu(2)Si(2) is a paramagnetic metal with particularly heavy electrons. Here we present tunneling spectroscopy measurements as a function of temperature (from 0.15 to 45 K). The tunneling conductance at 0.15 K reveals V-shaped dips around the Fermi level in both compounds, which disappear in CeRu(2)Si(2) above the coherence temperature, and in CeRh(2)Si(2) above the Néel temperature. In the latter case, two different kinds of V-shaped tunneling conductance dips are found.