Normal state Hall effect in Nd1-xCaxBa2Cu3O7-delta: competition between added charge and disorder
2003 (English)In: Physica. C, Superconductivity, ISSN 0921-4534, Vol. 390, no 2, 160-166 p.Article in journal (Refereed) Published
The transport properties of sintered samples of Nd1-xCaxBa2CU3O7-delta with 0 less than or equal to x less than or equal to 0.20 have been studied in the normal state by Hall resistivity measurements. The Hall coefficient, R-H(x, T) was well described in terms of two different models. In a phenomenological narrow band model, the conduction band width became narrower with increasing Ca concentration while the density of states band width decreased slightly. A competition between two effects (i) added charge, and (ii) disorder introduced into the CuO2 planes by doping, could be the main reason for the observed small decrease of the band widths. In the Anderson model, the temperature dependent part of the Hall angle was independent of hole concentration and disorder while the temperature independent part increased linearly with increasing Ca content. The results in both models support that Ca introduces disorder in the CuO2 planes.
Place, publisher, year, edition, pages
2003. Vol. 390, no 2, 160-166 p.
Hall coefficient, Nd1-xCaxBa2Cu3O7-delta, electronic band widths
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:kth:diva-22532DOI: 10.1016/s0921-4534(03)00700-7ISI: 000183191200011OAI: oai:DiVA.org:kth-22532DiVA: diva2:341230
QC 20100525 201112052010-08-102010-08-102011-12-05Bibliographically approved