Physics – Condensed Matter – Materials Science
Scientific paper
2008-05-06
Phys. Rev. B 77, 184405 (2008)
Physics
Condensed Matter
Materials Science
5 pages, 4 figures
Scientific paper
10.1103/PhysRevB.77.184405
Using valence band photoemission we have demonstrated the presence of a pseudogap in the near Fermi level electronic spectrum of some of the mixed phase compositions of Sm$_{1-x}$Ca$_x$MnO$_3$ system. The pseudogap was found to grow in size over a large region of the phase diagram of this system, finally leading to a metal-insulator transition. We have made a study comparing the near Fermi level behaviors of this system to those of a canonical double exchange system, namely, La$_{1-x}$Sr$_x$MnO$_3$. This study intends to highlight one of the important differences between the phase separated and double exchange colossal magnetoresistance systems in the nature of their energy gaps across the metal-insulator transitions. These differences could be ascribed to the distortions in the MnO$_6$ octahedra of their structures that regulate the localization of charge carriers. We have discussed our results from the point of view of models based on the idea of phase separation.
Dalai M. K.
Kundu Rajen
Martin Chris
Pal Pinaki
Sekhar B. R.
No associations
LandOfFree
Pseudogap behavior of phase-separated Sm$_{1-x}$Ca$_x$MnO$_3$ : A comparative photoemission study with double exchange 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 Pseudogap behavior of phase-separated Sm$_{1-x}$Ca$_x$MnO$_3$ : A comparative photoemission study with double exchange, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pseudogap behavior of phase-separated Sm$_{1-x}$Ca$_x$MnO$_3$ : A comparative photoemission study with double exchange will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-208991