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Phys. Rev. Lett. 99, 197201 (2007) [4 pages]

Orbital Fluctuations and Orbital Flipping in RVO3 Perovskites

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J.-Q. Yan1,2, J.-S. Zhou2, J. B. Goodenough2, Y. Ren3, J. G. Cheng4, S. Chang1, J. Zarestky1, O. Garlea1, A. Llobet5, H. D. Zhou2, Y. Sui4, W. H. Su4, and R. J. McQueeney1
1Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
2Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78712, USA
3Experimental Facilities Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
4Center of Condensed Matter, Harbin Institute Technology, Harbin, 150001, People’s Republic of China
5Los Alamos Neutron Science Center, Lujan Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA

See Also: Publisher's Note

Received 20 February 2007; published 8 November 2007; corrected 18 February 2009

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 TCG 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 3T1g site symmetry.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.197201
DOI:
10.1103/PhysRevLett.99.197201
PACS:
75.60.Jk, 61.12.Ld, 65.40.Ba, 66.70.+f

See Also

Publisher's Note: J.-Q. Yan, J.-S. Zhou, J. B. Goodenough, Y. Ren, J. G. Cheng, S. Chang, J. Zarestky, O. Garlea, A. Llobet, H. D. Zhou, Y. Sui, W. H. Su, and R. J. McQueeney, Publisher’s Note: Orbital Fluctuations and Orbital Flipping in RVO3 Perovskites [Phys. Rev. Lett. 99, 197201 (2007)], Phys. Rev. Lett. 102, 089901 (2009).

 
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