Quantum Magnetic Excitations from Stripes in Copper-Oxide Superconductors

Abstract

In the copper-oxide parent compounds of the high-transition-temperature superconductors, the valence electrons are localized, one per copper site, due to strong intraatomic Coulomb repulsion. A symptom of the localization is antiferromagnetism, where the spins of localized electrons alternate between up and down. The superconductivity appears when mobile 'holes' are doped into this insulating state, and it coexists with antiferromagnetic fluctuations. In one approach to the coexistence, the holes are believed to self-organize into 'stripes' that alternate with antiferromagnetic (insulating) regions within copper-oxide planes. Such an unusual electronic state would necessitate an unconventional mechanism of superconductivity. There is an apparent problem with this picture, however: measurements of magnetic excitations in superconducting YBa(2)Cu(3)O(6+x) near optimum doping are incompatible with the naive expectations for a material with stripes. Here we report neutron scattering measurements on stripe-ordered La(1.875)Ba(0.125)CuO(4). We show that the measured excitations are, surprisingly, quite similar to those in YBa(2)Cu(3)O(6+x) (i.e., the predicted spectrum of magnetic excitations is wrong). We find instead that the observed spectrum can be understood within a stripe model by taking account of quantum excitations. Our results support the concept that stripe correlations are essential to high-transition-temperature superconductivity.

11 pages, including 4 figures; revised version (rewritten abstract, text shortened, some changes to references, part of Fig. 4 eliminated)

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• Magnetic Excitations in the Site-Centered Stripe Phase: Spin Wave Theory of Coupled Three-Leg Ladders
• Phase separation and second-order phase transition in the phenomenological model for Coulomb frustrated 2D system
• Renormalization of Commensurate Magnetic Peak in Ni-doped La${}_{1.85}$Sr${}_{0.15}$CuO${}_4$
• The Fermi surface reconstruction in stripe phases of cuprates
• Dynamical charge and spin density wave scattering in cuprate superconductor
• Enhanced low-energy magnetic excitations evidencing the Cu-induced localization in an Fe-based superconductor Fe${}_{0.98}$Te${}_{0.5}$Se${}_{0.5}$
• Opening a nodal gap by fluctuating spin-density-wave in lightly doped La${}_{2-x}$Sr${}_x$CuO${}_4$
• Spin correlations in the parent phase of Li${}_{1-x}$Fe${}_x$ODFeSe
• Phase separation and pairing fluctuations in oxide materials
• High Temperature Superconductivity - Magnetic Mechanisms
• Anomalous isotope effect in BCS superconductors with two boson modes
• Unusual electronic structure in underdoped cuprate superconductors
• Enhancement of pairing in a boson-fermion model for coupled ladders
• The fermi arc and fermi pocket in cuprates in a short-range diagonal stripe phase
• Theory of the hourglass dispersion of magnetic excitations in high-T${}_c$ cuprates
• Magnetic excitations of Sr${}_3$Ir${}_2$O${}_7$ observed by inelastic neutron scattering measurement
• Nernst effect of iron pnictide and cuprate superconductors: signatures of spin density wave and stripe order
• Coexistence of the antiferromagnetic and superconducting order and its effect on spin dynamics in electron-doped high-$T_c$ cuprates
• La${}_{2-x}$Ba${}_x$CuO${}_4$ as a superconducting Rosetta Stone
• Simulation of a hump structure in the optical scattering rate within a generalized Allen formalism and its application to copper oxide systems
• Finding and classifying an infinite number of cases of the marginal phase transition in one-dimensional Ising models
• Electronic Liquid Crystal Physics of Underdoped Cuprates
• Broad line-width of antiferromagnetic spinwave due to electrons correlation
• The Berry phase: a topological test for the spectrum structure of frustrated quantum spin systems
• Berry connection from many-body wave functions and superconductivity: Calculations by the particle number conserving Bogoliubov-de Gennes equations
• Tunable striped-patterns by lattice anisotropy and magnetic impurities in d-wave superconductors
• The Inward Dispersion of the Neutron Scattering Experiments in HTSC Cuprates
• Tri-component-pairing chiral superconductivity on the honeycomb lattice with mixed $s$- and $d$-wave symmetries
• Probing the pseudogap and beyond: Examining single-particle properties of the hole- and electron-doped Hubbard model
• The Itinerancy and Interactions of the Linear Strings of Holes in Copper Oxide Superconductors
• Impurity-Scattering Assisted Umklapp Scattering as the Origin of Low-Temperature Resistivity in the Normal-State of Cuprate Superconductors
• Metallic State of the Three-band Hubbard Model with Super-lattice Structure
• Toward the detection of spin-vortex-induced loop currents in a single bilayer Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ thin film and their possible use as qubits: Model calculations for three nano-island architecture
• Unified description of charge and spin excitations of stripes in cuprates
• Variational Monte Carlo study of spin dynamics in underdoped cuprates
• Universal properties of modulated antiferromagnetic systems
• Evidence of Magnetic Correlations Among the Charge Stripe Electrons of Charge-Stripe Ordered La2NiO4.11