Novel dynamic scaling regime in hole-doped La2CuO4

Abstract

Only 3% hole doping by Li is sufficient to suppress the long-range 3-dimensional (3D) antiferromagnetic order in La2CuO4. The spin dynamics of such a 2D spin liquid state at T << J was investigated with measurements of the dynamic magnetic structure factor S(omega,q), using cold neutron spectroscopy, for single crystalline La2Cu0.94Li0.06O4. S(omega,q) peaks sharply at (pi,pi) and crosses over around 50K from omega/T scaling to a novel low temperature regime characterized by a constant energy scale. The possible connection to a crossover from the quantum critical to the quantum disordered regime of the 2D antiferromagnetic spin liquid is discussed.

4 pages, 4 figures

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Cited by in corpus (17)

• Magnetic neutron scattering in hole doped cuprate superconductors
• Central mode and spin confinement near the boundary of the superconducting phase in YBa2Cu3O6.353 (Tc=18 K)
• Spin-glass phase of cuprates
• Spin dynamics near the critical doping in weakly-superconducting underdoped YBa2Cu3O6.35 (Tc=18K)
• Evolution of the low energy spin dynamics in electron-doped high-transition temperature superconductor Pr0.88LaCe0.12CuO4-d
• Anomalous scaling behavior of the dynamical spin susceptibility of Ce${}_{0.925}$La${}_{0.075}$Ru${}_2$Si${}_2$
• Universal Behavior and the Two-component Character of Magnetically Underdoped Cuprate Superconductors
• Electronic inhomogeneity and competing phases in electron-doped superconducting Pr0.88LaCe0.12CuO4
• Ordered magnetism in the intrinsically decorated $j{}_{\mathrm{eff}}$ = $\frac{1}{2}$ $\alpha$-CoV${}_3$O${}_8$
• Partial spin freezing in the quasi-two-dimensional La2(Cu,Li)O4
• Slow spin-glass and fast spin-liquid components in quasi-two-dimensional La2(Cu,Li)O4
• Correlations and dynamics of spins in an XY-like spin-glass (Ni0.4Mn0.6)TiO3 single crystal system
• Further analysis of the quantum critical point of Ce${}_{1-x}$La${}_x$Ru${}_2$Si${}_2$
• The Fincher-Burke spin excitations and omega/T scaling in the insulating 5% Sr-doped La2CuO4
• Freezing of spin dynamics in underdoped cuprates
• Separation of magnetic and superconducting behaviour in YBCO6.33 (Tc=8.4 K)
• Freezing of spin dynamics and omega/T scaling in underdoped cuprates