TY - JOUR
T1 - Orbital hybridization in R VO3 perovskites
T2 - A high-pressure study
AU - Zhou, J. S.
AU - Goodenough, J. B.
AU - Yan, J. Q.
AU - Cheng, J. G.
AU - Matsubayashi, K.
AU - Uwatoko, Y.
AU - Ren, Y.
N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].
PY - 2009/12/22
Y1 - 2009/12/22
N2 - The R VO3 perovskites undergo orbital ordering and orbital-flipping transitions as well as a spin ordering transition. However, the existing model of orbital ordering fails to explain the thermal conductivity, which remains poor and glassy in the orbitally ordered phase. The phonon thermal conductivity is restored only below a first-order orbital-flipping transition. Orbital ordering induces a specific lattice distortion, which makes uniaxial pressure suitable to distinguish and verify all possible orbital and spin orderings in orthorhombic R VO3. We have made a systematic study of orbital/spin transitions in single-crystal samples of R VO3 (R=Dy, Y1-x Lax) under uniaxial and hydrostatic pressure. Comparison of the uniaxial and hydrostatic pressure effects on the spin/orbital-flipping transition permits us to identify orbital fluctuations due to the hybridization of t2 and et orbitals in the type- G orbitally ordered phase. © 2009 The American Physical Society.
AB - The R VO3 perovskites undergo orbital ordering and orbital-flipping transitions as well as a spin ordering transition. However, the existing model of orbital ordering fails to explain the thermal conductivity, which remains poor and glassy in the orbitally ordered phase. The phonon thermal conductivity is restored only below a first-order orbital-flipping transition. Orbital ordering induces a specific lattice distortion, which makes uniaxial pressure suitable to distinguish and verify all possible orbital and spin orderings in orthorhombic R VO3. We have made a systematic study of orbital/spin transitions in single-crystal samples of R VO3 (R=Dy, Y1-x Lax) under uniaxial and hydrostatic pressure. Comparison of the uniaxial and hydrostatic pressure effects on the spin/orbital-flipping transition permits us to identify orbital fluctuations due to the hybridization of t2 and et orbitals in the type- G orbitally ordered phase. © 2009 The American Physical Society.
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U2 - 10.1103/PhysRevB.80.224422
DO - 10.1103/PhysRevB.80.224422
M3 - RGC 21 - Publication in refereed journal
SN - 1098-0121
VL - 80
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 22
M1 - 224422
ER -