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Colossal Magnetoresistance Manganites are
another example of correlated systems where the competition between different
degrees of freedom drives the systems toward several magnetic phases (AF to FM)
and charge separation. The typical phase diagram of double layer manganite is
shown below.
In
our research group we are interested in understanding the microscopic behavior
of quasiparticles near phase transitions, and studying self-energy effects due
to renormalization of quasiparticles through collective excitations of different
natures. We are also interested in probing the changes in the local
crystallographic structure induced by the onset of different magnetic phases.
Our approach is to combine two probes ARPES and
EXAFS to study the electronic and local crystallographic structure at the
phase boundaries.
Selected Publications
(please see Publications for a
more complete listing):
Crossover
from large to
small polarons across the metal-insulator transition in manganites
A. Lanzara,
N. L. Saini, M. Brunelli,
F. Natali,
A. Bianconi, P. G.
Radaelli, S. M. Cheong
Phys. Rev.
Lett. 81, 878 (1998)
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