Strain-induced metal-insulator phase coexistence in perovskite manganites
* SPEAKERS
Name
Affiliation
E-mail
Keun Hyuk Ahn
Los Alamos National Lab
* HOST(Applicant)
Name
Affiliation
E-mail
-
* DATE / TIME
2004-05-10, 4:00 pm
* PLACE
Bldg 3, Room#201, POSTECH
* ABSTRACT
The coexistence of sub-micrometer-size insulating and metallic domains in the same sample of perovskite manganites[1] is believed to be essential to the understanding of colossal magnetoresistance in these materials, and has been a puzzle to both theorists and experimentalists.
In this talk[2], I will demonstrate, using an atomic scale description of lattice distortions and long-range strains, that the intrinsic energy landscape, that is, the presence of multiple local energy minimum states with different lattice distortions, provides a natural mechanism for such multiphase coexistence within the same material.
