Publisher’s Note: Orbital Fluctuations and Orbital Flipping in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>R</mml:mi><mml:msub><mml:mi>VO</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math>Perovskites [Phys. Rev. Lett.<b>99</b>, 197201 (2007)]

Yan, Jiaqiang; Zhou, Jianshi; Goodenough, John B; Ren, Yafei; Cheng, Jinguang; Chang, S.; Zarestky, J.; Garlea, V. Ovidiu; Llobet, Anna; Zhou, Hailong; Sui, Yongqiang; Su, Wenhui; McQueeney, R. J.

doi:10.1103/physrevlett.102.089901

Cited by 17 publications

(30 citation statements)

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“…Within the monoclinic phase at 15 K, the doping-induced reduction of the cell volume (3.1%) is similar to the value determined at 295 K, but the decrease of the b axis is larger than that of the c axis, indicating the presence of Jahn-Teller distortions of the VO 6 octahedra. Usually a change of the lattice parameters is strongly influenced by the ionic size and the valence of the R n+ ions, as shown earlier for rare-earth vanadates RVO 3 [15][16][17][18]. In the system Pr 1−x Ca x VO 3 , the influence of the ionic size effect at the R site should be negligible since the ionic radii of Pr 3+ and Ca 2+ are almost identical (see Ref.…”

Section: B Influence Of Ca Doping On the Crystal Structurementioning

confidence: 69%

“…The influence of the orbital degrees of freedom of the d electrons on the magnetic and transport properties of metal-oxide compounds has attracted much attention in recent years [1]. Mott-insulating orthovanadates of chemical composition RVO 3 (R = Y or a trivalent rare-earth metal) have been widely studied as a model system of the coupling between the spin and orbital degrees of freedom [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. The valence electrons on the V 3+ ions (electron configuration 3d…”

Section: Introductionmentioning

confidence: 99%

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Spin and orbital disordering by hole doping inPr1−xCaxVO3<

et al. 2016

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High-resolution powder x-ray diffraction and single-crystal neutron diffraction were used to investigate the crystal structure and magnetic ordering of the compound Pr 1−x Ca x VO 3 (0 x 0.3), which undergoes an insulator-to-metal transition for x ∼ 0.23. Since the ionic radii of Pr 3+ and Ca 2+ are almost identical and structural disorder is minimal, Pr 1−x Ca x VO 3 is a good model system for the influence of hole doping on the spin and orbital correlations in transition metal oxides. The end member PrVO 3 is a Mott-Hubbard insulator, which exhibits a structural phase transition at T S = 180 K from an orthorhombic to a monoclinic structure with space groups Pbnm and P 2 1 /b, respectively. This transition is associated with the onset of orbital ordering and strong Jahn-Teller distortions of the VO 6 octahedra. Antiferromagnetic C-type order with vanadium moments oriented in the ab plane is observed below T N = 140 K. Upon cooling, the vanadium moments induce a progressive magnetic polarization of the praseodymium sublattice, resulting in a ferrimagnetic structure with coexisting modes (C x , F y ) and (F x , C y ). In the insulating range of the Pr 1−x Ca x VO 3 phase diagram, Ca doping reduces both the orbital and magnetic transition temperatures so that T S = 108 K and T N = 95 K for x = 0.20. The Jahn-Teller distortions and ordered vanadium moments also decrease upon doping. In a metallic sample with x = 0.30, Jahn-Teller distortions and long-range orbital ordering are no longer observable, and the average crystal structure remains orthorhombic down to low temperature. However, broadening of some lattice Bragg reflections indicate a significant increase in lattice strain. Antiferromagnetic short-range order with a weak ordered moment of 0.14(3) μ B per vanadium atom could still be observed on the vanadium site below T ∼ 60 K. We discuss these observations in terms of doping-induced spin-orbital polaron formation.

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Section: B Influence Of Ca Doping On the Crystal Structurementioning

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Spin and orbital disordering by hole doping inPr1−xCaxVO3<

et al. 2016

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“…This IR dependence of the transition temperatures is opposite to that in Fig 1(a). A comparative study 8 In order to explore the evolution of spin and orbital ordering with La-doping in the whole composition range, we have extended our study to compositions in the interval 0.30 ≤ x ≤ 1.0 by measuring magnetic properties, thermal conductivity, and specific heat.…”

Section: +mentioning

confidence: 99%

“…The doping dependence of the orbital and spin ordering for Y 1-x La x VO 3 in the composition interval 0 ≤ x < 0.20 has been well-studied and reported elsewhere. 8 In this range, the partial replacement of Y by La increases the average R…”

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confidence: 99%

Spin and orbital ordering in Y1−xLaxVO3

et al. 2011

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The spin and orbital ordering in Y 1-x La x VO 3 (0.30 ≤ x ≤ 1.0) has been studied to map out the phase diagram over the whole doping range 0 ≤ x ≤ 1. The phase diagram is compared with that for RVO 3 (R = rare earth or Y) perovskites without A-site variance.For x > 0.20, no long-range orbital ordering was observed above the magnetic ordering temperature T N ; the magnetic order is accompanied by a lattice anomaly at a T t ≤ T N as in

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“…The insulating Y 1−x La x VO 3 , a JT active system, has been of considerable interest due to its complex phase diagram [5][6][7][8][9][10][11][12][13] associated with orbital physics [14][15][16][17][18][20][21][22]. With cooling, the parent compound, YVO 3 , undergoes a transition to a G-type orbital ordering (anti-phase ordering along the c-axis, G-OO) at T OO ∼ 200 K, followed by a C -type antiferromagnetic spin ordering at T N ∼ 116 K (C-SO) and finally to an orbital flipping transition at T CG ∼ 77 K with C -type orbital ordering (in-phase ordering along the c-axis, C-OO) and G-type spin ordering (G-SO) [19,20].…”

Section: Introductionmentioning

confidence: 99%

Y1−xLaxVO3: Effects of doping on orbital ordering

et al. 2014

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The effects of isovalent doping on orbital ordering in the perovskite Y1−xLaxVO3 was investigated using neutron diffraction and the pair distribution function analysis. YVO3 is a prototype for orbital ordering, exhibiting two consecutive transitions to G-type and C-type ordering with decreasing temperature. Evidence for local orbital ordering above the transition temperature of TOO ∼ 200 K is presented, obtained from the temperature dependence of the oxygen-oxygen octahedral correlations. This suggests that locally, G-type orbital ordering is present above the TOO temperature but it is short-range. With doping, it is expected that orbital ordering disappears altogether. By 30 % of doping as in Y0.7La0.3VO3, even though no orbital ordering is expected, we find that locally, C-type orbital correlations are most likely present below the magnetic transition temperature, TN , allowing for a direct paramagnetic to orbitally ordered/antiferromagnetic transition in this composition.

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Publisher’s Note: Orbital Fluctuations and Orbital Flipping inRVO3Perovskites [Phys. Rev. Lett.99, 197201 (2007)]

Cited by 17 publications

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Spin and orbital disordering by hole doping inPr1−xCaxVO3<

Spin and orbital disordering by hole doping inPr1−xCaxVO3<

Spin and orbital ordering in Y1−xLaxVO3

Y1−xLaxVO3: Effects of doping on orbital ordering

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