A Collective Heavy Fermion State and Superconductivity in Pr$_{1-x}$La$_x$Os$_4$Sb$_{12}$: Specific Heat and Susceptibility Study
| dc.creator | Rotundu, C. R. | |
| dc.creator | Kumar, P. | |
| dc.creator | Andraka, B. | |
| dc.date | 2004-02-24 | |
| dc.date.accessioned | 2026-07-07T02:56:39Z | |
| dc.date.available | 2026-07-07T02:56:39Z | |
| dc.description | Low temperature susceptibility and specific heat for single crystals of Pr$_{1-x}$La$_x$Os$_4$Sb$_{12}$ (0 $\leq x$ $\leq 1$) are reported. La-doping leaves CEF energies of Pr essentially unchanged. The average $T_c$ is only weakly affected by the La-substitution and varies approximately linearly between the end-compounds. The second superconducting transition disappears between $x$=0.05 and 0.1. The discontinuity in $C/T$ at $T_c$, on the other hand, is drastically reduced from about 1000 mJ/K$^2$mol for $x$=0 to 200 mJ/K$^2$mol for $x$=0.2. $ΔC/T_c$ decreases further for alloys corresponding to $x\geq 0.6$ to the value of a conventional superconductor LaOs$_4$Sb$_{12}$. This behavior implies non-single impurity origin of the heavy fermion state in PrOs$_4$Sb$_{12}$. We argue that critical quadrupolar fluctuations are responsible for this heavy fermion state. | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0402599 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0402599 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/23409 | |
| dc.subject | Superconductivity | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | A Collective Heavy Fermion State and Superconductivity in Pr$_{1-x}$La$_x$Os$_4$Sb$_{12}$: Specific Heat and Susceptibility Study | |
| dc.type | text |