Orbital hybridization in R VO3 perovskites: A high-pressure study

J. S. Zhou; J. B. Goodenough; J. Q. Yan; J. G. Cheng; K. Matsubayashi; Y. Uwatoko; Y. Ren

doi:10.1103/PhysRevB.80.224422

Orbital hybridization in R VO3 perovskites: A high-pressure study

J. S. Zhou, J. B. Goodenough, J. Q. Yan, J. G. Cheng, K. Matsubayashi, Y. Uwatoko, Y. Ren

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

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.

Original language	English
Article number	224422
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	80
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.80.224422
State	Published - Dec 22 2009
Externally published	Yes

Access to Document

10.1103/PhysRevB.80.224422

Cite this

@article{0ae0894c56154353882854daf7f27d2a,

title = "Orbital hybridization in R VO3 perovskites: A high-pressure study",

abstract = "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.",

author = "Zhou, {J. S.} and Goodenough, {J. B.} and Yan, {J. Q.} and Cheng, {J. G.} and K. Matsubayashi and Y. Uwatoko and Y. Ren",

year = "2009",

month = dec,

day = "22",

doi = "10.1103/PhysRevB.80.224422",

language = "English",

volume = "80",

journal = "Physical Review B - Condensed Matter and Materials Physics",

issn = "1098-0121",

publisher = "American Physical Society",

number = "22",

}

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.

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.

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.

UR - http://www.scopus.com/inward/record.url?scp=77954700419&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.80.224422

DO - 10.1103/PhysRevB.80.224422

M3 - Article

AN - SCOPUS:77954700419

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 -

Orbital hybridization in R VO3 perovskites: A high-pressure study

Abstract

Access to Document

Other files and links

Fingerprint

Cite this