Incommensurate spin fluctuations in high-transition temperature superconductors
- Massachusetts Institute of Technology, Cambridge, MA (United States); and others
Neutron scattering experiments has revealed a fascinating interplay between the hole doping, the spin fluctuations, and the superconductivity of the cuprate superconductors. Recently, electrochemical techniques have been used to produce large single crystals of La{sub 2}CuO{sub 4+y}, which has mobile oxygen dopants. Staging behavior of the excess oxygen has been demonstrated, and the low-energy spin fluctuations in stage 6 La{sub 2}CuO{sub 4+y} have been measured. The spin fluctuations are incommensurate with the lattice and have spatial, energy, and temperature dependencies very much like those in La{sub 2-x}Sr{sub x}CuO{sub 4}, with similar high transition temperature. This establishes the universally of the incommensurate spin fluctuations among the La{sub 2}CuO{sub 4} -based superconductors. 18 refs., 6 figs.
- OSTI ID:
- 569313
- Journal Information:
- Science, Journal Name: Science Journal Issue: 5329 Vol. 277; ISSN SCIEAS; ISSN 0036-8075
- Country of Publication:
- United States
- Language:
- English
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