Charge-density-wave instabilities in the low-dimensional molybdenum bronzes and oxides

Schlenker, C.; Dumas, J.; Escribe-Filippini, C.; Guyot, H.; Marcus, J.; Fourcaudot, G.

doi:10.1080/13642818508240627

Cited by 109 publications

(37 citation statements)

References 45 publications

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“…At T > T P , the Hall signal is almost independent of temperature. At the Peierls temperature one observes a downturn of ρ xy (T ) (and increase of |ρ xy |), which is a typical signature of the opening of the CDW bandgap and condensation of electronic carriers 69,70 . Upon further cooling, the Hall resistivity decreases until it reaches a minimum followed by a prominent increase of ρ xy (and decrease of |ρ xy |), which grows even higher than for temperatures above T P .…”

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confidence: 99%

Magnetism and charge density waves inRNiC2(R=Ce,Pr,Nd)

et al. 2017

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We have compared the magnetic, transport, galvanomagnetic and specific heat properties of CeNiC2, PrNiC2 and NdNiC2 to study the interplay between charge density waves and magnetism in these compounds. The negative magnetoresistance in NdNiC2 is discussed in terms of the partial destruction of charge density waves and an irreversible phase transition stabilized by the field induced ferromagnetic transformation is reported. For PrNiC2 we demonstrate that the magnetic field initially weakens the CDW state, due to the Zeeman splitting of conduction bands. However, the Fermi surface nesting is enhanced at a temperature related to the magnetic anomaly.

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confidence: 99%

Magnetism and charge density waves inRNiC2(R=Ce,Pr,Nd)

et al. 2017

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“…Strong electronelectron and electron-phonon interactions lead to phenomena such as charge density waves, superconductivity, periodic lattice distortions, and Peierls transitions. 5,6 K 0.3 MoO 3 is a member of a large class of quasi-low dimensional layered materials, the Mo oxide bronzes, 7 and displays a strongly anisotropic electronic structure. 4,6 The parent compound α-MoO 3 has a related crystal structure, but is a quasi-two dimensional (2D) insulator.…”

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confidence: 99%

Electronic structure of the 1D conductor K_0.3MoO₃studied using resonant inelastic x-ray scattering and soft x-ray emission spectroscopy

Learmonth

Glans

McGuinness

et al. 2008

J. Phys.: Condens. Matter

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Abstract:The electronic structure of the quasi-one dimensional conductor K 0.3 MoO 3 has been measured using high resolution resonant inelastic x-ray scattering and x-ray absorption spectroscopy. The data is compared to that from the related two dimensional insulator α-MoO 3. Scattering features are observed from both oxides that are explained in terms of the band momentum selectivity of the scattering process, allowing a comparison of the scattering data to recent band structure calculations.PACS: 78.70.En 2 Synchrotron radiation excited resonant inelastic x-ray scattering (RIXS) and soft x-ray emission spectroscopy (XES) are emerging as important probes of electronic structure in complex materials. XES allows the local, element-and site-specific partial density of states (PDOS) to be measured for valence band states, while RIXS measures low energy valence excitations with the same element and site specificity.1,2 An interesting issue in the application of these spectroscopies is their sensitivity to the dimensionality of the sample. We report here an exploration of dimensional effects in soft x-ray emission and scattering from the prototypical low dimensional transition metal oxide K 0.3 MoO 3 ("blue bronze"). X-rays scattered at the O K-edge were found to be sensitive to the band momentum, k. This is unexpected since the strong quasi- Our results provide new insight on the electronic structure of molybdenum oxide bronzes.Quasi-one dimensional (1D) transition metal oxides have been studied for many years since they exhibit some of the most complex electronic behavior in solids. Strong electronelectron and electron-phonon interactions lead to phenomena such as charge density waves, superconductivity, periodic lattice distortions, and Peierls transitions. 5,6 K 0.3 MoO 3 is a member of a large class of quasi-low dimensional layered materials, the Mo oxide bronzes, 7 and displays a strongly anisotropic electronic structure. 4,6 The parent compound α-MoO 3 has a related crystal structure, but is a quasi-two dimensional (2D) insulator. Despite the enduring interest in these materials, there have been few measurements of their electronic structure using RIXS or resonant soft x-ray emission spectroscopy XES. 8 RIXS can be used, under the proper circumstances, to probe the k resolved band structure of solids. [9][10][11] The mechanism that provides k selectivity is emitted photons with a polarization perpendicular to that of the incident photons. We are unable to measure RIXS with the incident photon polarization vector exactly parallel to either the sample surface or the sample surface normal, but must move approximately 15< away from the desired axis to allow x-rays to both enter and exit the sample in the appropriate directions. All of the RIXS/XES spectra are normalized to the main peak maximum, so all noted intensity changes are relative to the peak of the observed emission at 526

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“…2,4 ␥-Mo 4 O 11 , which has minor crystallographic differences from -Mo 4 O 11 , has similar behavior, except that the former shows only one anomaly. 1 It is well known that CDW is strongly connected with the geometry of the Fermi surface ͑FS͒. The most important feature of the FS of this material is the hidden one dimensionality.…”

Section: Introductionmentioning

confidence: 99%

“…1 This material has a monoclinic crystal structure with lattice parameters of a = 24.54 Å, b = 5.439 Å, and c = 6.701 Å. 2 The crystal structure consists of conductive slabs, which are made up of MoO 6 octahedra ͑4d 2 ͒, and insulating layers, which are made up of MoO 4 tetrahedra ͑4d 0 ͒.…”

Section: Introductionmentioning

confidence: 99%

Hidden one dimensionality in Fermi surfaces ofη−Mo4O11observed by Compton scattering experiments

et al. 2005

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We have investigated Fermi surfaces of a low-dimensional Mo oxide, -Mo 4 O 11 , using Compton scattering.The Fermi surfaces projected onto the a * plane, obtained from the two-dimensional reconstruction method, show a good agreement with those predicted by a previous band-theory study. Hidden one dimensionality, which is the most important feature in explaining the charge-density wave behavior in this material, is clearly observed in the experimentally obtained Fermi surfaces.

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Charge-density-wave instabilities in the low-dimensional molybdenum bronzes and oxides

Cited by 109 publications

References 45 publications

Magnetism and charge density waves inRNiC2(R=Ce,Pr,Nd)

Magnetism and charge density waves inRNiC2(R=Ce,Pr,Nd)

Electronic structure of the 1D conductor K_0.3MoO₃studied using resonant inelastic x-ray scattering and soft x-ray emission spectroscopy

Hidden one dimensionality in Fermi surfaces ofη−Mo4O11observed by Compton scattering experiments

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Charge-density-wave instabilities in the low-dimensional molybdenum bronzes and oxides

Cited by 109 publications

References 45 publications

Magnetism and charge density waves inRNiC2(R=Ce,Pr,Nd)

Magnetism and charge density waves inRNiC2(R=Ce,Pr,Nd)

Electronic structure of the 1D conductor K0.3MoO3studied using resonant inelastic x-ray scattering and soft x-ray emission spectroscopy

Hidden one dimensionality in Fermi surfaces ofη−Mo4O11observed by Compton scattering experiments

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Electronic structure of the 1D conductor K_0.3MoO₃studied using resonant inelastic x-ray scattering and soft x-ray emission spectroscopy