Polar Antiferromagnets Produced with Orbital Order

被引：9

作者：

Ogawa, Naoki ^{[1
,2
]}

Ogimoto, Yasushi ^{[1
,2
,3
]}

Ida, Yoshiaki ^{[4
]}

Nomura, Yusuke ^{[4
]}

Arita, Ryotaro ^{[4
,5
]}

Miyano, Kenjiro ^{[1
,2
]}

机构：

[1] Univ Tokyo, RCAST, Meguro Ku, Tokyo 1538904, Japan

[2] Japan Sci & Technol Agcy, CREST, Kawaguchi, Saitama 3320012, Japan

[3] Fuji Elect Co Ltd, Hino, Tokyo 1918502, Japan

[4] Univ Tokyo, Grad Sch Engn, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan

[5] Japan Sci & Technol Agcy, PREST, Kawaguchi, Saitama 3320012, Japan

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 15期

关键词：

PHASE-CONTROL; FERROELECTRICITY; MANGANITES; STATE; TRANSITION; ROTATION;

D O I：

10.1103/PhysRevLett.108.157603

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Polar states are realized in pseudocubic manganite films fabricated on high-index substrates, in which a Jahn-Teller (JT) distortion remains an active variable. Several types of orbital orders (OOs) were found to develop large optical second harmonics, signaling broken-inversion symmetry distinct from their bulk forms and films on (100) substrates. The observed symmetry lifting and first-principles calculation both indicate that the modified JT q(2) mode drives Mn-site off centering, which can be controlled by a magnetic-field-induced phase transition via a coupling of OO and spin orders.

引用

页数：5

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