TY - JOUR
T1 - Polar antiferromagnets produced with orbital order
AU - Ogawa, Naoki
AU - Ogimoto, Yasushi
AU - Ida, Yoshiaki
AU - Nomura, Yusuke
AU - Arita, Ryotaro
AU - Miyano, Kenjiro
PY - 2012/4/13
Y1 - 2012/4/13
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.108.157603
DO - 10.1103/PhysRevLett.108.157603
M3 - Article
AN - SCOPUS:84859838703
SN - 0031-9007
VL - 108
JO - Physical Review Letters
JF - Physical Review Letters
IS - 15
M1 - 157603
ER -