Magneto-elastic coupling between copper spin configurations and oxygen octahedra in La(2-x)Sr(x)CuO(4). Untwinning, Raman (phonon) spectrum, and neutron response

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dc.creatorNeto, M. B. Silva
dc.date2006-02-21
dc.date2006-06-12
dc.date.accessioned2026-07-07T07:01:51Z
dc.date.available2026-07-07T07:01:51Z
dc.descriptionWe reinterpret neutron scattering and Raman spectroscopy experiments in La(2-x)Sr(x)CuO(4), showing modulation of spin and lattice degrees of freedom both in the low-temperature orthorhombic and tetragonal phases, in terms of a magneto-elastic coupling between noncollinear configurations for the copper spins and the oxygen octahedra. The magneto-elastic coupling furthermore explains the recently discovered magnetic-field induced untwinning in La(2-x)Sr(x)CuO(4), for x<2%, and allows us to understand why in La(2-x-y)Sr(x)Nd(y)CuO(4) with y=0.4 and x=1/8, for example, when (1,0) and/or (0,1) static spin spirals are stabilized due to hole frustration, the atomic modulation in the low-temperature tetragonal phase of La(2-x-y)Sr(x)Nd(y)CuO(4) has a periodicity of 4 lattice spacings, half the magnetic one.
dc.description5 pages, 5 figures, Revised version, to appear in Physical Review B
dc.identifierhttps://arxiv.org/abs/cond-mat/0602492
dc.identifierhttp://arxiv.org/abs/cond-mat/0602492
dc.identifierPhys. Rev. B 74, 045109 (2006)
dc.identifierdoi:10.1103/PhysRevB.74.045109
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/108405
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleMagneto-elastic coupling between copper spin configurations and oxygen octahedra in La(2-x)Sr(x)CuO(4). Untwinning, Raman (phonon) spectrum, and neutron response
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