Nonsaturating linear resistivity up to 900 K in MgB2 (Articolo in rivista)

Type
Label
  • Nonsaturating linear resistivity up to 900 K in MgB2 (Articolo in rivista) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Alternative label
  • Pallecchi I.; Belfortini C.; Canepa F.; Ferdeghini C.; Manfrinetti P.; Palenzona A.; Vaglio R.; Putti M. (2009)
    Nonsaturating linear resistivity up to 900 K in MgB2
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Pallecchi I.; Belfortini C.; Canepa F.; Ferdeghini C.; Manfrinetti P.; Palenzona A.; Vaglio R.; Putti M. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 79 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note
  • In: Physical Review B, vol. 79 article n. 134508. The American Physical Society, 2009. (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR-INFM-LAMIA and Università di Genova, Genova, Italy, DCCI, CNR-IMEM, Genova and Università di Genova, Genova, Italy, CNR-COHERENTIA and Università di Napoli \"Federico II,\" Italy (literal)
Titolo
  • Nonsaturating linear resistivity up to 900 K in MgB2 (literal)
Abstract
  • In this work, we report resistivity measurements on MgB2 polycrystalline samples with increasing degree of doping (disorder) up to temperatures higher than 900 K. In all cases the normal state curves are linear with increasing temperatures, with no sign of flattening or downward bending (saturation) at high temperature. This behavior, in sharp contrast to what is observed in superconducting compounds such as A15 and Chevrel phases, can be explained considering the dominant pi contribution to the electric conduction, together with the smaller electron-phonon coupling of pi carriers in MgB2, as compared to characteristic coupling strength of those compounds. This indicates that in MgB2 the disorder introduced in the lattice by thermal oscillations even at 900 K can still be considered as a perturbation within the Boltzmann description of transport. (literal)
Prodotto di
Autore CNR
Insieme di parole chiave

Incoming links:


Autore CNR di
Prodotto
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
Insieme di parole chiave di
data.CNR.it