Pressure Effects on the Optical Properties of NdVO4

Bandiello, Enrico; Sánchez-Martín, Josu; Errandonea, Daniel; Bettinelli, Marco

doi:10.3390/cryst9050237

Cited by 12 publications

(26 citation statements)

References 40 publications

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“…Usually ten or eleven Raman modes are measured [62,63,64] being one Eg mode difficult to be detected because of it has a weak Raman scattering cross-section and overlaps with one of the A1g modes. The twelve modes have been only measured in NdVO4 [23]. In order to illustrate changes induced by pressure in the Raman spectrum we show results measured in TbVO4 [59].…”

Section: Rare-earth Vanadates Under High Pressurementioning

confidence: 99%

“…The accurate knowledge of the electronic properties of MVO4 vanadates is crucial for the developing of their technical applications. Several studies have been carried out to characterize these properties in rare-earth vanadates; they have been carried out at ambient conditions and under high-pressure [15,23,44,115,116,117].…”

Section: Electronic Propertiesmentioning

confidence: 99%

“…In addition to the detailed characterization of the high-pressure structural behavior of lanthanide vanadates, there have been studies on their optical [13] and vibrational properties [22]. One interesting feature related to the phase transitions reported is the collapse of the band-gap, which in cases reaches up to 1 eV [15,23]. This phenomenon is connected to the increase of the hybridization between O 2p and V 3d orbitals, which is favored by the rearrangement of the VO4 and AO8 polyhedral units caused by phase transitions.…”

Section: Introductionmentioning

confidence: 99%

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High pressure crystal structures of orthovanadates and their properties

Errandonea

2020

Journal of Applied Physics

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Pressure-induced phase transitions in orthovanadates have led to interesting physical phenomena. The observed transitions usually involve large volume collapses and drastic changes in the electronic and vibrational properties of the materials. In some cases, the phase transitions implicate coordination changes in vanadium, which has important consequences in the physical properties of vanadates. In this Perspective, we explore the current knowledge of the behavior of MVO4 vanadates under compression. In particular, we summarize studies of the structural, vibrational, and electronic properties and a few illustrative examples of high-pressure research in the compounds of interest are discussed. A systematic understanding of the highpressure behavior of MVO4 compounds is presented, putting the emphasis on results that could be relevant for practical applications. Recent advances and future challenges in the study of orthovanadates under extreme pressure will be reviewed, along with conclusions that could have consequences for the studies of related oxides. Some ideas on topics that may lead to exciting breakthroughs in the near future will be presented too.

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Section: Rare-earth Vanadates Under High Pressurementioning

confidence: 99%

Section: Electronic Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High pressure crystal structures of orthovanadates and their properties

Errandonea

2020

Journal of Applied Physics

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“…As a result, first-order phase transitions, involving large volume changes, have been discovered at pressures below 10 GPa (for instance, the zircon-scheelite and zirconmonazite transitions in alkaline earth vanadates [10,11]). Many of these transitions lead to interesting phenomena such as a collapse of the electronic band gap [12]. In contrast, very little effort has been dedicated to study kagome staircase orthovanadates under HP.…”

Section: Introductionmentioning

confidence: 99%

High-Pressure Structural Behavior and Equation of State of Kagome Staircase Compound, Ni3V2O8

et al. 2020

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We report on high-pressure synchrotron X-ray diffraction measurements on Ni3V2O8 at room-temperature up to 23 GPa. According to this study, the ambient-pressure orthorhombic structure remains stable up to the highest pressure reached in the experiments. We have also obtained the pressure dependence of the unit-cell parameters, which reveals an anisotropic compression behavior. In addition, a room-temperature pressure–volume third-order Birch–Murnaghan equation of state has been obtained with parameters: V0 = 555.7(2) Å3, K0 = 139(3) GPa, and K0′ = 4.4(3). According to this result, Ni3V2O8 is the least compressible kagome-type vanadate. The changes of the crystal structure under compression have been related to the presence of a chain of edge-sharing NiO6 octahedral units forming kagome staircases interconnected by VO4 rigid tetrahedral units. The reported results are discussed in comparison with high-pressure X-ray diffraction results from isostructural Zn3V2O8 and density-functional theory calculations on several isostructural vanadates.

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“…In another original article, Enrico Bandiello et al [8] studied the high-pressure behavior of zircon-type NdVO 4 . In particular, these authors report on optical spectroscopic measurements in pure NdVO 4 crystals at pressures up to 12 GPa.…”

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confidence: 99%