Disappearance of Antiferromagnetic Spin Excitations in OverdopedLa2−xSrxCuO4

2006/09/30 by S. Wakimoto, Shuichi Wakimoto, K. Yamada +5 · 7 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Brillouin zone #Condensed matter physics #Magnetic and transport properties of perovskites and related materials #Magnetism #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Spectral line #Spectroscopy #Spin (aerodynamics) #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevlett.98.247003

published as Phys. Rev. Lett. 98, 247003 (2007) · 4 pages, 3 figures

openalex publication_date 2007/06/11 · arxiv created 2007/06/12 · arxiv updated 2009/12/01 · openalex created_date 2017/12/04 · openalex updated_date 2026/08/05

Abstract

Magnetic excitations for energies up to \ensuremath∼100 meV are studied for overdoped La_2\ensuremath-xSr_xCuO₄ with x=0.25 and 0.30, using time-of-flight neutron spectroscopy. Comparison of spectra integrated over the width of an antiferromagnetic Brillouin zone demonstrates that the magnetic scattering at intermediate energies, 20\ensuremath\lesssim\ensuremathω\ensuremath\lesssim100 meV, progressively decreases with overdoping. This strongly suggests that the magnetism is not related to Fermi surface nesting, but rather is associated with a decreasing volume fraction of (probably fluctuating) antiferromagnetic bubbles.

Citations

• Dispersion of Magnetic Excitations in Optimally Doped SuperconductingYBa2Cu3O6.95
• Systematic doping evolution of the underlying Fermi surface ofLa2−xSrxCuO4
• Two energy scales in the spin excitations of the high-temperature superconductor La2−xSrxCuO4
• Direct Relation between the Low-Energy Spin Excitations and Superconductivity of Overdoped High-TcSuperconductors
• Magnetic energy change available to superconducting condensation in optimally doped YBa2Cu3O6.95
• Evolution of the stripe phase as a function of doping from a theoretical analysis of angle-resolved photoemission data
• Quantum magnetic excitations from stripes in copper oxide superconductors

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• Resilience ofd-wave superconductivity to nearest-neighbor repulsion
• On the contribution of nearly critical spin and charge collective modes to the Raman spectra of high-Tc cuprates
• Magnetic field resonantly enhanced free spins in heavily underdopedYBa2Cu3O6+x
• Magnetic excitations and amplitude fluctuations in insulating cuprates