Incommensurate spin correlations induced by magnetic Fe ions substituted into overdoped Bi1.75Pb0.35Sr1.90CuO6+z

Abstract

Spin correlations in the overdoped region of Bi1.75Pb0.35Sr1.90CuO6+z have been explored with Fe-doped single crystals characterized by neutron scattering, muon-spin-rotation (muSR) spectroscopy, and magnetic susceptibility measurements. Static incommensurate spin correlations induced by the Fe spins are revealed by elastic neutron scattering. The resultant incommensurability delta is unexpectedly large (~0.2 r.l.u.), as compared with delta ~ 1/8 in overdoped superconductor La2-xSrxCuO4. Intriguingly, the large delta in this overdoped region is close to the hole concentration p. This result is reminiscent of the delta ~ p trend observed in underdoped La2-xSrxCuO4; however, it is inconsistent with the saturation of delta in the latter compound in the overdoped regime. While our findings in Fe-doped Bi1.75Pb0.35Sr1.90CuO6+z support the commonality of incommensurate spin correlations in high-Tc cuprate superconductors, they also suggest that the magnetic response might be dominated by a distinct mechanism in the overdoped region.

4 pages, 5 figures. Revision in introduction, discussion, and conclusions

References in corpus (4)

• Spin dynamics in the pseudogap state of a high-temperature superconductor
• Two energy scales in the spin excitations of the high-T_c superconductor La${}_{2-x}$Sr${}_x$CuO${}_4$
• Testing the itinerancy of spin dynamics in superconducting Bi2212
• Change of the Ground State upon Hole Doping Unveiled by Ni Impurity in High-$T_{\mathrm{c}}$ Cuprates

Cited by in corpus (10)

• Progress in Neutron Scattering Studies of Spin Excitations in High-Tc Cuprates
• Hidden itinerant-spin phase in heavily-overdoped La2-xSrxCuO4 revealed by dilute Fe doping: A combined neutron scattering and angle-resolved photoemission study
• Distinct Fe-induced magnetic states in the underdoped and overdoped regimes of La2-xSrxCu1-yFeyO4 revealed by muon spin relaxation
• Suppression of Superfluid Density and the Pseudogap State in the Cuprates by Impurities
• Development of Cu-spin correlation in Bi_1.74_Pb_0.38_Sr_1.88_Cu_1-y_Zn_y_O_6+d_ high-temperature superconductors observed by muon spin relaxation
• Successive magnetic transitions relating to itinerant spins and localized Cu spins in La2-xSrxCu1-yFeyO4: Possible existence of stripe correlations in the overdoped regime
• Magnetic field effect on Fe-induced short-range magnetic correlation and electrical conductivity in Bi${}_{1.75}$Pb${}_{0.35}$Sr${}_{1.90}$Cu${}_{0.91}$Fe${}_{0.09}$O${}_{6+y}$
• Magnetic Impurity Effects on Ferromagnetic Fluctuations in Heavily Overdoped (Bi,Pb)${}_2$Sr${}_2$Cu${}_{1-y}$Fe${}_y$O${}_{6+\delta }$ Cuprates
• Zn-induced spin dynamics in overdoped La${}_{2-x}$Sr${}_x$Cu${}_{1-y}$Zn${}_y$O${}_4$
• Incommensurate Antiferromagnetic Order in the Fe-substituted Bi-2201 Cuprate in the Heavily Overdoped Regime