Ultrafast Switching of the Electric Polarization and Magnetic Chirality in BiFeO3 by an Electric Field

被引：51

作者：

Bhattacharjee, Satadeep ^{[1
,2
]}

Rahmedov, Dovran ^{[1
,2
]}

Wang, Dawei ^{[3
,4
]}

Iniguez, Jorge ^{[5
]}

Bellaiche, L. ^{[1
,2
]}

机构：

[1] Univ Arkansas, Dept Phys, Fayetteville, AR 72701 USA

[2] Univ Arkansas, Inst Nanosci & Engn, Fayetteville, AR 72701 USA

[3] Xi An Jiao Tong Univ, Elect Mat Res Lab, Key Lab, Minist Educ, Xian 710049, Peoples R China

[4] Xi An Jiao Tong Univ, Int Ctr Dielect Res, Xian 710049, Peoples R China

[5] ICMAB CSIC, Inst Ciencia Mat Barcelona, Bellaterra 08193, Spain

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 112卷 / 14期

关键词：

1ST-PRINCIPLES THEORY; PHASE-TRANSITIONS; PEROVSKITES; CRYSTAL; ORDER;

D O I：

10.1103/PhysRevLett.112.147601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using a first-principles-based effective Hamiltonian within molecular dynamics simulations, we discover that applying an electric field that is opposite to the initial direction of the polarization results in a switching of both the polarization and the magnetic chirality vector of multiferroic BiFeO3 at an ultrafast pace (namely, of the order of picoseconds). We discuss the origin of such a double ultrafast switching, which is found to involve original intermediate magnetic states and may hold promise for designing various devices.

引用

页数：5

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