Incommensurate Spin Correlations Induced by Magnetic Fe ions Substituted into Overdoped Bi1.75Pb0.35Sr1.90CuO6+z
Journal Article
·
· Physical Review. B. Condensed Matter and Materials Physics
Spin correlations in the overdoped region of Bi{sub 1.75}Pb{sub 0.35}Sr{sub 1.90}CuO{sub 6+z} have been explored with Fe-doped single crystals characterized by neutron scattering, muon-spin-rotation 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 La{sub 2-x}Sr{sub x}CuO{sub 4}. Intriguingly, the large {delta} in this overdoped region is close to the hole concentration p. This result is reminiscent of the {delta}{approx}p trend observed in underdoped La{sub 2-x}Sr{sub x}CuO{sub 4}; however, it is inconsistent with the saturation of {delta} in the latter compound in the overdoped regime. While our findings in Fe-doped Bi{sub 1.75}Pb{sub 0.35}Sr{sub 1.90}CuO{sub 6+z} support the commonality of incommensurate spin correlations in high-T{sub c} cuprate superconductors, they also suggest that the magnetic response might be dominated by a distinct mechanism in the overdoped region.
- Research Organization:
- BROOKHAVEN NATIONAL LABORATORY (BNL)
- Sponsoring Organization:
- Doe - Office Of Science
- DOE Contract Number:
- AC02-98CH10886
- OSTI ID:
- 988267
- Report Number(s):
- BNL--91154-2010-JA; KC0202010
- Journal Information:
- Physical Review. B. Condensed Matter and Materials Physics, Journal Name: Physical Review. B. Condensed Matter and Materials Physics Journal Issue: 14 Vol. 81; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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