Romero, D.
, Moritomo, Y.
, Mitchell, J.
and Drew, H.
(2001),
Competition of Charge, Orbital, and Ferromagnetic Correlations in Layered Manganites, Physical Review B (Condensed Matter and Materials Physics)
(Accessed April 29, 2024)
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Competition of Charge, Orbital, and Ferromagnetic Correlations in Layered Manganites
Published
Author(s)
, Y Moritomo, J.F. Mitchell, H D. Drew
Abstract
We investigated the competition of charge, orbital, and ferromagnetic interactions in layered manganites by magneto-Raman scattering spectroscopy. The charge-order insulator LaSr2Mn207 reveals the phononic signatures of charge and orbital ordering which co-exist with double-exchange in the colossal magnetoresistance (CMR)compound La1.2Sr1.8Mn207. The CMR effect is a balance between the orbital and ferromagnetic correlations. A strong incoherent scattering by charge-order fluctuations dominates the quasiparticle dynamics in the ferromagnetic-metal state. The scattering is suppressed at low frequencies, consistent with the opening of a charge-density wave pseudogap and suggestive of non-Fermi liquid behavior.Citation
Physical Review B (Condensed Matter and Materials Physics)
Volume
63
Issue
No. 13
Pub Type
Journals
Keywords
charge ordering, ferromagnetic-metal, layered manganites, non-Fermi liquid, orbital ordering, quantum criticality, Raman spectroscopy
Citation
Created April 1, 2001, Updated February 17, 2017