Coexistence of localized and itinerant carriers near Tc in calcium-doped manganites

Physics – Condensed Matter – Strongly Correlated Electrons

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

RevTex, 11 pages, 4 figures. Revised version submitted to PRB, 01/99

Scientific paper

10.1103/PhysRevB.60.1028

We explore the possibility that polaronic distortions in the paramagnetic phase of La$_{0.67}$Ca$_{0.33}$MnO$_3$ manganites persist in the ferromagnetic phase by considering the observed electrical resistivity to arise from coexisting field- and temperature-dependent polaronic and band-electron fractions. We use an effective medium approach to compute the total resistivity of the two-component system, and find that a limit with low percolation threshold explains the data rather well. To test the validity of this model, we apply it to the thermoelectric coefficient. We propose a plausible mean-field model that reproduces the essential features of a microscopic model and provides a comparison with the experimental mixing fraction, as well as the magnetization and magnetic susceptibility.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Coexistence of localized and itinerant carriers near Tc in calcium-doped manganites does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Coexistence of localized and itinerant carriers near Tc in calcium-doped manganites, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coexistence of localized and itinerant carriers near Tc in calcium-doped manganites will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-187769

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.