Charge density wave instabilities in the quasi-two-dimensional metal η-Mo<sub>4</sub>O<sub>11</sub>

Guyot, H.; Escribe-Filippini, C.; Fourcaudot, G.; Konate, K.; Schlenker, C.

doi:10.1088/0022-3719/16/36/003

Cited by 55 publications

(16 citation statements)

References 8 publications

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“…16 A consequence of this in-plane anisotropy, or ''hidden'' one dimensionality, is that -Mo 4 O 11 undergoes two chargedensity-wave ͑CDW or so-called Peierls͒ transitions, 10,11 one at T CDW-I ϭ109 K, and the other at T CDW-II ϭ30 K; on cooling, the resistance exhibits metallic behavior with anomalies at T CDW-I and T CDW-II . 11 The nesting vector Q I ϭ0.23 b*, at T CDW-I , has been confirmed by diffuse x-ray scattering and is indicated in Figs. 1͑a͒ and 1͑b͒.…”

Section: Introductionmentioning

confidence: 66%

“…10,11,[22][23][24][25][26] The RRR's listed in Table I have been calculated by taking ratios between the resistances at 25 and 4.2 K; this is done to avoid complications associated with the two CDW transitions at ϳ30 and 109 K. Using the same criterion, we can compare RRR's for our samples with those from other published data. In Ref.…”

Section: Resultsmentioning

confidence: 99%

“…We shall see that sample quality has a strong impact on many of the lowtemperature, high-magnetic-field, properties of -Mo 4 O 11 , as has also been noted in a number of other studies. 10,11,[22][23][24][25][26] For this reason, where possible, resistance versus temperature ͑RvT͒ curves were recorded during each sample cool down ͑see Sec. III A͒; in Table I, we list RRR's for most of the samples.…”

Section: Methodsmentioning

confidence: 99%

“…9. The -Mo 4 O 11 crystal structure is built up of layers of MoO 6 octahedra, parallel to ͑100͒, separated by MoO 4 tetrahedra, 11 giving rise to quasitwo-dimensional electronic properties. In this paper we focus specifically on monoclinic -Mo 4 O 11 .…”

Section: Introductionmentioning

confidence: 99%

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Quantum limit and anomalous field-induced insulating behavior in η-Mo4O11<

Hill

Valfells

Uji³

et al. 1997

Phys. Rev. B

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The quasi-two-dimensional metal -Mo 4 O 11 undergoes two successive charge-density-wave transitions at 109 and 30 K, with corresponding changes in the electronic structure. Measurements of the magnetoresistance, Hall effect, and magnetization, in magnetic fields of up to 50 T and as a function of temperature and pressure, have been performed to determine the ground-state electronic structure. Several distinct quantum oscillations are observed in the low-field magnetoresistance, corresponding to very small closed Fermi surfaces, all of which reach the quantum limit by 20 T. Analysis of the quantum oscillation amplitudes indicate very low carrier effective masses (m*Ͻ0.1m e ) associated with each of the closed two-dimensional Fermi-surface pockets. At higher fields ͑BϾ20 T͒ we see a crossover from ͑semi-͒ metallic to semiconducting behavior, which we associate with a field-induced electron-and hole-band inversion, resulting in a clear gap at the Fermi energy. Measurements of this energy gap allow an independent determination of the carrier effective masses, which are in excellent agreement with the values obtained from the analysis of the low-field ͑BϽ15 T͒ quantum oscillations. We find that the transport and thermodynamic properties of the field-induced insulating state are highly anomalous. In particular, we discuss the Hall effect and the origin of an additional quantum oscillation at high magnetic fields ͑BϾ20 T͒. ͓S0163-1829͑97͒00504-3͔

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Section: Introductionmentioning

confidence: 66%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Quantum limit and anomalous field-induced insulating behavior in η-Mo4O11<

Hill

Valfells

Uji³

et al. 1997

Phys. Rev. B

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“…The electric and thermal conductive properties of -Mo 4 O 11 show anomalies at 109 K ͑T p1 ͒ and 30 K ͑T p2 ͒. 3 Below T p1 and T p2 , incommensurate modulations of the crystal structure, which are defined by nesting vectors q 1 = ͑0 , 0.23b * , 0͒ and q 2 = ͑0.55a * , 0.47b * , 0.30c * ͒, respectively, have been detected by electron diffraction and x-ray diffuse scattering. 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.…”

Section: Introductionmentioning

confidence: 94%

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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Coexistent Phases and their Electrical and Structural Behaviour in the Ternary Re/Mo/O System

Doerr

Feller

Oppermann

1996

Cryst. Res. Technol.

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In ordcr to complete arid improve phase diagrarns of transition metal oxidcs the existence and properties of compounds in the Re/Mo/O system have been investigated. Single crystalline solid solutions R c I -~M o ,~~ (0 < z < 0.37) and Mol-,Re,Oz (0 < y < 0.42) wcre prepared by Solid State Reactions and Chcmical Transport Reactions (CTR) and characterized by means of X-ray-diffrxtion, ICP-AES, and EPMA. In addition, it was shown that the trioxides Rel_,Mo,03 or Mol-,Re,03 respectively, do not prove a distinct solubility. First results on Rc-doped Magneli phases of Mo arc also discussed. There were found two series of solid solutions Mo4-ZReZO11 (0 < z < 0.40) which derive frorn y-ModOll and r,-Mo$3ll. Thc other Magneli phascs did not show a significant Re content. Using X-ray diffraction, AFM and optical microscopy the structurc and morphology of single crystals has bccn studied. It was stcated that the dioxide solid solutions wcrc very homogeneous and structural phase transitions depending on z or y did not occur. That is in good agreement with measurements of electrical coridiictivity u in the temperature range from 20K to 300K in which the samples showed thc behavioiir of inetals with lattice defects. The Magneli phases Mo8O23 and Mo<,O2(i turned out to be "narrow gap semiconductors" in the low tcmperaturc range with activation energies of less than 0.1 eV. The r,-MoaOil-and y-Mo~Oll crystals, the pure and Rc-doped ones, were foinid as metallic conductors at higher temperatures and below a transition temperature they show a serriiconductivc bchaviour.

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Charge density wave instabilities in the quasi-two-dimensional metal η-Mo₄O₁₁

Cited by 55 publications

References 8 publications

Quantum limit and anomalous field-induced insulating behavior in η-Mo4O11<

Quantum limit and anomalous field-induced insulating behavior in η-Mo4O11<

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

Coexistent Phases and their Electrical and Structural Behaviour in the Ternary Re/Mo/O System

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Charge density wave instabilities in the quasi-two-dimensional metal η-Mo4O11

Cited by 55 publications

References 8 publications

Quantum limit and anomalous field-induced insulating behavior in η-Mo4O11<

Quantum limit and anomalous field-induced insulating behavior in η-Mo4O11<

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

Coexistent Phases and their Electrical and Structural Behaviour in the Ternary Re/Mo/O System

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Product

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Charge density wave instabilities in the quasi-two-dimensional metal η-Mo₄O₁₁