Colossal Magnetoresistance Manganites

Colossal Magnetoresistance Manganites are an 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 Journal Articles for a more complete list.)

Bilayer splitting and c-axis coupling in CMR bilayer manganites
C. Jozwiak, J. Graf, S. Y. Zhou, A. Bostwick, E. Rotenberg, H. Zheng, J. F. Mitchell and A. Lanzara
Phys. Rev. B 80, 235111 (2009)

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)