Direct evidence for charge stripes in a layered cobalt oxide

Abstract

Recent experiments indicate that static stripe-like charge order is generic to the hole-doped copper oxide superconductors and competes with superconductivity. Here we show that a similar type of charge order is present in La${}_{5/3}$Sr${}_{1/3}$CoO${}_4$, an insulating analogue of the copper oxide superconductors containing cobalt in place of copper. The stripe phase we have detected is accompanied by short-range, quasi-one-dimensional, antiferromagnetic order, and provides a natural explanation for the distinctive hourglass shape of the magnetic spectrum previously observed in neutron scattering measurements of La${}_{5/3}$Sr${}_{1/3}$CoO${}_4$ and many hole-doped copper oxide superconductors. The results establish a solid empirical basis for theories of the hourglass spectrum built on short-range, quasi-static, stripe correlations.

References in corpus (21)

• How to detect fluctuating order in the high-temperature superconductors
• Progress in Neutron Scattering Studies of Spin Excitations in High-Tc Cuprates
• Stripe order at low temperatures in La{2-x}Sr{x}NiO4 for 1/3 < x < 1/2
• Melting of Quasi-Two-Dimensional Charge Stripes in La5/3Sr1/3NiO4
• Independent freezing of charge and spin dynamics in La1.5Sr0.5CoO4
• Magnetic correlations in La2-xSrxCoO4 studied by neutron scattering : possible evidence for stripe phases
• Hour-glass magnetic spectrum in an insulating, hole-doped antiferromagnet
• Neutron scattering studies on stripe phases in non-cuprate materials
• Hour-glass magnetic excitations induced by nanoscopic phase separation in cobalt oxides La${}_{2-x}$Sr${}_x$CoO${}_4$
• Spin-entropy driven melting of the charge order in La1.5Sr0.5CoO4
• Magnetic order and dynamics of the charge-ordered antiferromagnet La1.5Sr0.5CoO4
• Anisotropic Susceptibility of La_2-xSr_xCoO_4 related to the Spin States of Cobalt
• Magnetic spectrum of the two-dimensional antiferromagnet La2CoO4 studied by inelastic neutron scattering
• Magnetic Excitations of Stripes Near a Quantum Critical Point
• Hour-glass magnetic spectrum in a stripe-less insulating transition metal oxide
• Stripeless incommensurate magnetism in a doped strongly correlated oxide
• Disorder, cluster spin glass, and hour-glass spectra in striped magnetic insulators
• Stripe disorder and dynamics in the hole-doped antiferromagnetic insulator La5/3Sr1/3CoO4
• Universal features of charge and spin order in a half-doped layered perovskite
• The Hour-Glass Magnetic Spectrum Arising from a Striped, Cluster Spin Glass Ground State in La1.75Sr0.25CoO4
• Magnetic phase diagram of La${}_{2-x}$Sr${}_x$CoO${}_4$ revised using muon-spin relaxation

Cited by in corpus (9)

• Charge ordering in superconducting copper oxides
• Distinct nature of static and dynamic magnetic stripes in cuprate superconductors
• Possible stripe phases in the multiple magnetization plateaus in TbB${}_4$ derived from single-crystal neutron diffraction under pulsed high magnetic fields
• Magnetic excitations of the charge stripe electrons below half doping in La(2-x)Sr(x)NiO4, x = 0.45 and x = 0.4
• Electronic transport through correlated electron systems with nonhomogeneous charge orderings
• Structural, magnetic and electric polarization properties of geometrically frustrated YBaCo4O7 and DyBaCo4O7 cobaltites
• Violation of Luttinger's theorem in the simplest doped Mott insulator: Falicov-Kimball model in strong correlation limit
• Stability of charge-stripe ordered La2-xSrxNiO4+delta at one third doping
• Identifying materials with charge-spin physics using charge-spin susceptibility computed from first principles