Orbital Fluctuations and Orbital Flipping in RVO3 Perovskites

Journal Article · Mon Jan 01 00:00:00 EST 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.99.197201· OSTI ID:931087

Yan, J. -Q. ^[1]; Zhou, J. -S. ^[2]; Goodenough, J. B. ^[2]; Ren, Y. ^[3]; Cheng, J. G. ^[4]; Zarestky, Jerel L ^[5]; Garlea, Vasile O ^[5]; Liobet, A. ^[6]; Zhou, H. D. ^[2]; Sui, Y. ^[4]; Su, W. H. ^[4]; McQueeney, R. J. ^[1]

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1. Ames Laboratory
2. University of Texas, Austin
3. Argonne National Laboratory (ANL)
4. Harbin Institute of Technology
5. ORNL
6. Los Alamos National Laboratory (LANL)

The effect of the average A-site ionic radius hIRi 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 . 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 t2 and et hybridization in 3T_1g site symmetry.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 931087
• Journal Information: Physical Review Letters, Vol. 99; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
VANADIUM OXIDES
LANTHANUM OXIDES
LUTETIUM OXIDES
BOND ANGLE
FLUCTUATIONS
PEROVSKITES
THERMAL CONDUCTIVITY
ORDER PARAMETERS
ELECTRONIC STRUCTURE