Spontaneous Formation of Zigzag Chains at the Metal-Insulator Transition in the β-Pyrochlore CsW2O6

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dc.contributor.author Hirai, Daigorou
dc.contributor.author Bremholm, Martin
dc.contributor.author Allred, Jared M.
dc.contributor.author Krizan, Jason
dc.contributor.author Schoop, Leslie M.
dc.contributor.author Huang, Qing
dc.contributor.author Tao, Jing
dc.contributor.author Cava, R. J.
dc.date.accessioned 2018-10-25T14:10:33Z
dc.date.available 2018-10-25T14:10:33Z
dc.date.issued 2013-04-19
dc.identifier.citation Hirai, Daigorou, et al. (2013): Spontaneous Formation of Zigzag Chains at the MetalInsulator Transition in the β-Pyrochlore CsW2O6. Physical Review Letters, 110. DOI: https://doi.org/10.1103/PhysRevLett.110.166402 en_US
dc.identifier.uri http://ir.ua.edu/handle/123456789/4099
dc.description.abstract A paramagnetic metal to nonmagnetic insulator transition at T MIT = 210     K is reported for the β -pyrochlore oxide CsW 2 O 6 , accompanied by a first order structural transition that creates ⟨ 110 ⟩ oriented chains in the pyrochlore lattice. Comparison of CsW 2 O 6 , which has 1 electron per 2 W sites, to the fully d 0 analog CsTaWO 6 shows that the transitions are electronically driven. Corefinement of high resolution synchrotron x-ray and neutron diffraction data shows that the structural distortion that creates the W chains cannot be attributed to simple charge or orbital ordering. Density functional theory calculations suggest that the phase transition is driven by a sharply peaked electronic density of states near the Fermi energy in the cubic β -pyrochlore phase. A further electronic instability is required to create the insulating ground state. en_US
dc.format.mimetype application/pdf en_US
dc.subject Condensed Matter en_US
dc.title Spontaneous Formation of Zigzag Chains at the Metal-Insulator Transition in the β-Pyrochlore CsW2O6 en_US
dc.type text en_US

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