Anisotropic optical conductivities due to spin and orbital ordering in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">LaVO</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">YVO</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></m

Fang, Zhong; Nagaosa, Naoto; Terakura, Kiyoyuki

doi:10.1103/physrevb.67.035101

Cited by 39 publications

(40 citation statements)

References 31 publications

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“…20,21, and 23) as none of the different data sets is in agreement with the theoretical predictions. 10,11,22 Here, we report on a detailed analysis of the optical conductivity σ (ω) of YVO 3 , GdVO 3 , and CeVO 3 in the frequency range from 0.8 to 5.0 eV for temperatures from 20 K to 500 K. Our results clarify the striking discrepancies of the data reported in Refs. 20,21,23 for YVO 3 .…”

Section: Introductionsupporting

confidence: 76%

Probing orbital fluctuations inRVO3(R=<

et al. 2012

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Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. We study optical excitations across the Mott gap in the multiorbital Mott-Hubbard insulators RVO 3 . The multipeak structure observed in the optical conductivity can be described consistently in terms of the different 3d 3 multiplets or upper Hubbard bands. The spectral weight is very sensitive to nearest-neighbor spin-spin and orbital-orbital correlations and thus shows a pronounced dependence on both temperature and polarization. Comparison with theoretical predictions based on either rigid orbital order or strong orbital fluctuations clearly rules out that orbital fluctuations are strong in RVO 3 . Both the line shape and the temperature dependence give clear evidence for the importance of excitonic effects.

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Section: Introductionsupporting

confidence: 76%

Probing orbital fluctuations inRVO3(R=<

et al. 2012

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“…A 7 × 7 × 5, 5 × 7 × 7 and 7 × 7 × 5 Monkhorst-Pack k-point mesh centered at Γ point are adopted for ( The Hubbard repulsion U eff (= U − J) is imposed on Ti's/V's 3d and La's 4f orbitals using the Dudarev implementation [26]. According to previous literature [27][28][29], U eff (Ti)=2.3 eV, U eff (V)=3 eV, and U eff (La)=8 eV are proper to reproduce the experimental properties and thus are adopted as default parameters in the following calculations, if not noted explicitly.…”

Section: Models and Methodsmentioning

confidence: 99%

(LaTiO3)n/(LaVO3)n as a model system for unconventional charge transfer and polar metallicity

et al. 2017

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At interfaces between oxide materials, lattice and electronic reconstructions always play important roles in exotic phenomena. In this study, the density functional theory and maximally localized Wannier functions are employed to investigate the (LaTiO3)n/(LaVO3)n magnetic superlattices. The electron transfer from Ti 3+ to V 3+ is predicted, which violates the intuitive band alignment based on the electronic structures of LaTiO3 and LaVO3. Such unconventional charge transfer quenches the magnetism of LaTiO3 layer mostly and leads to metal-insulator transition in the n = 1 superlattice when the stacking orientation is altered. In addition, the compatibility among the polar structure, ferrimagnetism, and metallicity is predicted in the n = 2 superlattice.

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“…To the best of our knowledge, there have been no neutron diffuse scattering experiments to detect the presence of the RF spins for any of the orthovanadate RVO 3 compounds. However, other experimental probes such as optical conductivity studies on LaVO 3 [34] or phonon activity studies on YVO 3 [35] have already suggested that inhomogeneity may play an important role in these materials. In the case of YVO 3 , Massa et al [35] suggested that the presence of faulty orbitals in the material is connected with lattice inhomogeneity.…”

Section: Iv-discussionmentioning

confidence: 99%

Magnetization reversal in orthovanadateRVO3compounds (R=La, Nd, Sm, Gd, Er, and Y): Inhomogeneit

2007

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Abstract:We report on a study of various RVO 3 single-crystal samples (R = La, Nd, Sm, Gd, Er and Y) which show temperature-induced magnetization reversal. For compounds with lighter rare-earths (R = La, Nd and Sm), magnetization reversal can be observed for magnetic field applied in the ab plane and along the c axis, whereas for the heavy rare-earths (R = Gd, Er) magnetization reversal is only observed when the field is applied along the a axis. YVO 3 has a magnetization reversal along all the main crystallographic axes in a modest applied field. We have found that some compounds are very sensitive to small trapped fields present in the superconducting solenoid of the magnetometer during the cooling. Based on the observed results, we argue that inhomogeniety caused by defects in the orbital sector in the quasi onedimensional orbital systems could account for the unusual magnetization reversal.

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Anisotropic optical conductivities due to spin and orbital ordering inLaVO3andYVO3

Cited by 39 publications

References 31 publications

Probing orbital fluctuations inRVO3(R=<

Probing orbital fluctuations inRVO3(R=<

(LaTiO3)n/(LaVO3)n as a model system for unconventional charge transfer and polar metallicity

Magnetization reversal in orthovanadateRVO3compounds (R=La, Nd, Sm, Gd, Er, and Y): Inhomogeneit

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