Journal
PHYSICAL REVIEW LETTERS
Volume 110, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.110.017004
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Funding
- Technology and Global COE Program Materials Integration, Tohoku University, MEXT Japan
- Office of Basic Energy Sciences, Division of Materials Science and Engineering, U.S. Department of Energy (DOE) [DE-AC02-98CH10886]
- National Science Foundation [DMR-0454672]
- [23340093]
- Grants-in-Aid for Scientific Research [22244039, 23226014] Funding Source: KAKEN
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We have performed inelastic neutron scattering measurements on the single-layer cuprate Bi2+xSr2-xCuO6+y (Bi2201) with x = 0.2, 0.3, 0.4, and 0.5, a doping range that spans the spin-glass to superconducting phase boundary. The doping evolution of low energy spin fluctuations ( less than or similar to 11 meV) was found to be characterized by a change in the incommensurate modulation wave vector from the tetragonal [110] to [100]/[010] directions, while maintaining a linear relation between the incommensurability and the hole concentration, delta approximate to p. In the superconducting regime, the spectral weight is strongly suppressed below similar to 4 meV. Similarities and differences in the spin correlations between Bi2201 and the prototypical single-layer system La2-xSrxCuO4 are discussed. DOI: 10.1103/PhysRevLett.110.017004
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