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Giant Optical Polarization Rotation Induced by Spin-Orbit Coupling in Polarons


Abstract: We have uncovered a giant gyrotropic magneto-optical response for doped ferromagnetic manganite La2/3Ca1/3MnO3 around the near room-temperature paramagnetic-to-ferromagnetic transition. At odds with current wisdom, where this response is usually assumed to be fundamentally fixed by the electronic band structure, we point to the presence of small polarons as the driving force for this unexpected phenomenon. We explain the observed properties by the intricate interplay of mobility, Jahn-Teller effect, and spin-orbit coupling of small polarons. As magnetic polarons are ubiquitously inherent to many strongly correlated systems, our results provide an original, general pathway towards the generation of magnetic-responsive gigantic gyrotropic responses that may open novel avenues for magnetoelectric coupling beyond the conventional modulation of magnetization. © 2016 American Physical Society.



Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Fuente: PRL 117, 026401 (2016)

Editorial: American Physical Society

 Fecha de publicación: 01/07/2016

Nº de páginas: 5

Tipo de publicación: Artículo de Revista

DOI: 10.1103/PhysRevLett.117.026401

ISSN: 0031-9007,1079-7114

Proyecto español: MAT2014-56063-C2-1-R ; FIS2012-37549-C05-04 ; IS2015-64886-C5-2-P ; MAT2012-37776

Url de la publicación: https://doi.org/10.1103/PhysRevLett.117.026401

Autores/as

CASALS, BLAI
CICHELERO, RAFAEL
PESQUERA, DAVID
CAMPOY-QUILES, MARIANO
INFANTE, INGRID C.
SANCHEZ, FLORENCIO
FONTCUBERTA, JOSEP
HERRANZ, GERVASI