An investigation on the role of spin fluctuations in the superconductivity of the spinel oxide LiTi2O4
Among the over 300 known spinel compounds, only four exhibit superconducting properties with LiTi2O4 (LTO) being the only nondisordered transition metal oxide. Despite its superconductivity (SC) identified in 1973, understanding of its SC mechanism has seen slow progress due to sample reproducibility. A recent renewed interest concerning the role of spin correlations in LTO began with an investigation of applying a quantum site percolation model (QSPM) and was supported by extensive charge transport/tunneling measurements on LTO films, revealing anomalous magnetoresistance behaviour. Despite evidence provided for the crucial role of spin fluctuations for SC in LTO, neutron studies have been limited to diffraction. We propose to use 7 days on D7 to measure the temperature-dependence of the magnetic diffuse scattering with the objective of observing significant changes in the magnetic diffuse scattering, supporting the hypothesis that these fluctuations play a key role in the SC of LTO. Since these fluctuations are known to play a crucial role in the high Tc's, if the role of fluctuations in LTO is confirmed, the proposed analogy between LTO and the high Tc's will be strengthened.
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SARTE Paul; J. Paul Attfiel;d; BROWNE Alexander; WIEBE Christopher and WILDES Andrew. (2016). An investigation on the role of spin fluctuations in the superconductivity of the spinel oxide LiTi2O4. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-32-833
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