Abstract
In this chapter, we will briefly review the previous studies relevant to the present thesis. We first describe the studies on superconductivity in systems with ladder-type lattice structures. After that, we introduce the studies concerning a mechanism for enhancing superconductivity in systems with coexisting wide and narrow bands. Finally, we describe the FLEX\(+\)DMFT method for superconductivity in single-band systems with strong electron correlations, which is a combined method of the non-perturbative dynamical mean-field theory and the perturbative fluctuation exchange approximation.
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Ogura, D. (2019). Background of the Present Thesis. In: Theoretical Study of Electron Correlation Driven Superconductivity in Systems with Coexisting Wide and Narrow Bands. Springer Theses. Springer, Singapore. https://doi.org/10.1007/978-981-15-0667-3_2
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DOI: https://doi.org/10.1007/978-981-15-0667-3_2
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