Evolution of superconductivity in Pr$_{1-x}$La$_{x}$Os$_{4}$Sb$_{12}$: Upper critical field measurements

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dc.creatorRotundu, C. R.
dc.creatorTsujii, H.
dc.creatorKumar, P.
dc.creatorAndraka, B.
dc.creatorSugawara, H.
dc.creatorAoki, Y.
dc.creatorSato, H.
dc.date2006-06-28
dc.date.accessioned2026-07-07T07:12:55Z
dc.date.available2026-07-07T07:12:55Z
dc.descriptionMeasurements of the upper critical field $H_{c2}$ near $T_c$ of Pr$_{1- x}$La$_{x}$Os$_{4}$Sb$_{12}$ were performed by specific heat. A positive curvature in $H_{c2}$ versus $T$ was observed in samples and concentrations exhibiting two superconducting transitions. These results argue against this curvature being due to two-band superconductivity. The critical field slope - $dH_{c2}/dT$ suggests the existence of a crossover concentration $x_{cr} \approx 0.25$, below which there is a rapid suppression of effective electron mass with La-alloying. This crossover concentration was previously detected in the measurement of the discontinuity of $C/T$ at $T_c$.
dc.identifierhttps://arxiv.org/abs/cond-mat/0606730
dc.identifierhttp://arxiv.org/abs/cond-mat/0606730
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/112249
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleEvolution of superconductivity in Pr$_{1-x}$La$_{x}$Os$_{4}$Sb$_{12}$: Upper critical field measurements
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