Polar antiferromagnets produced with orbital order

Naoki Ogawa, Yasushi Ogimoto, Yoshiaki Ida, Yusuke Nomura, Ryotaro Arita, Kenjiro Miyano

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number157603
JournalPhysical review letters
Volume108
Issue number15
DOIs
Publication statusPublished - 2012 Apr 13
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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