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- W2028757487 abstract "While the high-Tc cuprate problem remains an active field of research, several parallel studies in potentially related physical systems have been undertaken. For example, LiTi2O4, known to have a superconducting Tc of about 13K, has been suggested to have a strong relation to the cuprates. Our studies are addressing the key question: Are strong electronic correlations found in LiTi2O4? To answer this we have focussed on a study of the metal-to-insulator transition that LiAlyTi2-yO4 is found to undergo for y∼ 0.3, and have modelled this material using a quantum-site percolation model that includeselectronic correlations through an on-site repulsive Hubbard interaction. We find that in sucha model this transition is reproduced through the appearance of an Altshuler-Aronov-like suppression of the density of states at the Fermi level, called by some a pseudogap, when an intermediate-strength Hubbard interaction is introduced. Here we focus on results displaying the essential role that magnetic moments that develop on the Ti sites seem to play in producing this transition, physics absent from the original Altshuler-Aronov analysis." @default.
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- W2028757487 date "2009-02-01" @default.
- W2028757487 modified "2023-10-14" @default.
- W2028757487 title "Role of magnetic moments in the metal-to-insulator transition in LiAlyTi2-yO4" @default.
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- W2028757487 doi "https://doi.org/10.1088/1742-6596/150/2/022016" @default.
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