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

被引：18

作者：

Casals, Blai ^{[1
]}

Cichelero, Rafael ^{[1
]}

Garcia Fernandez, Pablo ^{[2
]}

Junquera, Javier ^{[2
]}

Pesquera, David ^{[1
]}

Campoy-Quiles, Mariano ^{[1
]}

Infante, Ingrid C. ^{[1
,3
]}

Sanchez, Florencio ^{[1
]}

Fontcuberta, Josep ^{[1
]}

Herranz, Gervasi ^{[1
]}

机构：

[1] Inst Ciencia Mat Barcelona ICMAB CSIC, Campus UAB, Bellaterra 08193, Catalonia, Spain

[2] Univ Cantabria, Dept Ciencias Tierra & Fis Mat Condensada, Cantabria Campus Int,Ave de los Castros S-N, E-39005 Santander, Spain

[3] Univ Paris Saclay, CNRS UMR 8580, CentraleSupelec, Lab Struct Proprietes & Modelisat Solides, F-92295 Chatenay Malabry, France

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 117卷 / 02期

关键词：

DOUBLE-EXCHANGE; MANGANITES; MAGNETORESISTANCE; CONDUCTIVITY; FERROMAGNET; MOTION;

D O I：

10.1103/PhysRevLett.117.026401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：5

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