ISSN:
1572-9605
Schlagwort(e):
Electrical resistivity
;
Hall effect
;
hole concentration
;
normal-state properties
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Elektrotechnik, Elektronik, Nachrichtentechnik
,
Physik
Notizen:
Abstract We report detailed studies of the superconducting and normal-state transport properties in NdBa2Cu3O7−y , Nd0.9Ca0.1Ba2Cu3O7−y , and Nd0.8Pr0.2Ba2Cu3O7−y , systems. We found a linear temperature dependence of resistivity ρ and the Hall number n H above T c. For a given sample ρ∝n H, which is inconsistent with any simple transport model in science (ρ∝1/n). However, ρ and n H at a fixed temperature for these three samples follow a relation ρ∝1/n H. This is evidence that n H could scale with actual mobile carrier concentration. The unit cell volume V is a linear function of n H. The T c −V−n H diagram indicates that there exist an optimal concentration n H and an optimal V for T c in these systems.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1023/A:1022605916820
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