Orbital hybridization in RVO3 perovskites: A high-pressure study
| Title | Orbital hybridization in RVO3 perovskites: A high-pressure study |
| Publication Type | Journal Article |
| Year of Publication | 2009 |
| Authors | Zhou JS, Goodenough JB, Yan JQ, Cheng JG, Matsubayashi K, Uwatoko Y, Ren Y |
| Journal Title | Physical Review B |
| Volume | 80 |
| Pages | 224422 |
| Date Published | 12/01 |
| ISBN Number | 1098-0121 |
| Accession Number | ISI:000273228500068 |
| Keywords | dysprosium compounds, fluctuations, high-pressure solid-state phase transformations, lanthanum compounds, phonons, spin-orbit interactions, thermal conductivity, yttrium compounds, YVO3 |
| Abstract | The RVO3 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 RVO3. We have made a systematic study of orbital/spin transitions in single-crystal samples of RVO3 (R=Dy, Y1-xLax) 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 t(2) and et orbitals in the type-G orbitally ordered phase. |
| URL | <Go to ISI>://000273228500068 |
| DOI | 10.1103/Physrevb.80.224422 |
