Heavy fermion behavior in PrRh2B2C: Excitonic mass enhancement

Date
Authors
Anand, V. K.
Hossain, Z.
Chen, G.
Nicklas, M.
Geibel, C.
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Description
We report magnetic and transport properties of a new quaternary borocarbide PrRh$_{2}$B$_{2}$C, based on magnetisation, resistivity and specific heat studies. This compound forms in LuNi$_{2}$B$_{2}$C-type tetragonal structure (space group {\it I4/mmm}) and does not exhibit magnetic ordering or superconductivity down to 0.5 K. The crystal field analysis of specific heat data suggests a singlet ground state in this compound. The high value of the Sommerfeld coefficient, $\gamma$ $\approx$ 250 mJ/mole K$^{2}$, together with a singlet ground state suggests that the heavy fermion behaviour in PrRh$_{2}$B$_{2}$C results from the interaction of the conduction electrons with the low lying crystal field excitations. No signature of magnetic ordering or superconductivity is observed in PrRh$_{2}$B$_{2}$C under the application of pressure up to 23 kbar.
Comment: 10 pages, 5 figures
Keywords
Condensed Matter - Strongly Correlated Electrons
Citation
Collections