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Normal state Hall effect in Nd1-xCaxBa2Cu3O7-delta: competition between added charge and disorder
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT. (Fasta tillståndets fysik)
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT. (Fasta tillståndets fysik)ORCID iD: 0000-0002-9858-6235
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT. (Fasta tillståndets fysik)
2003 (English)In: Physica. C, Superconductivity, ISSN 0921-4534, E-ISSN 1873-2143, Vol. 390, no 2, 160-166 p.Article in journal (Refereed) Published
Abstract [en]

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.
Keyword [en]
Hall coefficient, Nd1-xCaxBa2Cu3O7-delta, electronic band widths
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:kth:diva-22532DOI: 10.1016/s0921-4534(03)00700-7ISI: 000183191200011OAI: oai:DiVA.org:kth-22532DiVA: diva2:341230
Note
QC 20100525 20111205Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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Andersson, Magnus

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