Physical characterization reveals metal-insulator transition mechanisms in La3Ni2O7-δ, indicating charge ordering suppresses superconductivity.
The metal-insulator transition of La 3 Ni 2 O 7-δ with 2-dimensional electrons has been studied. Various physical properties can be understood by introducing a model of charge orderings in the NiO 2 planes induced by oxygen orderings. Arguments on the non-occurrence of the superconductivity are also given.
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Taniguchi et al. (1995) studied this question.
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