Orbital fluctuations and orbital flipping in RVO3 perovskites.
The effect of the average R-site ionic radius IR and variance on the orbital and magnetic order in R3+-doped YVO3 was studied in Y1-xLaxVO3 and Y1-x(La0.2337Lu0.7663)xVO3 with fixed IR. The orbital flipping temperature T{CG} increases nonlinearly with increasing R-site variance, indicating that the V-O-V bond angle is not the primary driving force stabilizing the C-type orbitally ordered phase. The suppressed thermal conductivity in the G-type orbitally ordered phase signals some remaining orbital randomness that is enhanced by t{2} and et hybridization in {3}T{1g} site symmetry.
Yan
J-Q
JQ
Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA.
Zhou
J-S
JS
Goodenough
J B
JB
Ren
Y
Y
Cheng
J G
JG
Chang
S
S
Zarestky
J
J
Garlea
O
O
Llobet
A
A
Liobet
A
A
Zhou
H D
HD
Sui
Y
Y
Su
W H
WH
McQueeney
R J
RJ