200 citations · 861 across the 28 of their papers we have counts for
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Superconducting landscape of the strongly correlated bilayer Hubbard model
Motoharu Kitatani, Yusuke Nomura, Shiro Sakai +1
Coupling two strongly correlated layers opens a distinct route to repulsion-driven superconductivity. Yet the same interlayer coupling makes the optimization of superconductivity h…
Heterostructuring as Gateway to Electron Doping of Nickelate Superconductors
Chao Deng, Motoharu Kitatani, Guiwen Jiang +7
Despite enormous expenditures in the research field, the electron-doped side of nickelate superconductors remains uncharted territory. Substituting the trivalent rare-earth cations…
Strong-coupling high- superconductivity in doped correlated band insulators
Yusuke Nomura, Motoharu Kitatani, Shiro Sakai +1
We explore the superconducting properties of the bilayer Hubbard model, which exhibits a high transition temperature () for an pairing, using a cluster extensi…
Spin fluctuations sufficient to mediate superconductivity in nickelates
Paul Worm, Qisi Wang, Motoharu Kitatani +12
Infinite-layer nickelates show high-temperature superconductivity, and the experimental phase diagram agrees well with the one simulated within the dynamical vertex approximation (…
Optimizing superconductivity: from cuprates via nickelates to palladates
Motoharu Kitatani, Liang Si, Paul Worm +3
Motivated by cuprate and nickelate superconductors, we perform a comprehensive study of the superconducting instability in the single-band Hubbard model. We calculate the spectrum…
Materials Design of Superconductivity in Nickelates
Motoharu Kitatani, Yusuke Nomura, Motoaki Hirayama +1
Motivated by the recent theoretical materials design of superconducting nickelates for which the charge transfer from the NiO to the block layer is completely suppressed…
Strongly correlated superconductivity with long-range spatial fluctuations
Motoharu Kitatani, Ryotaro Arita, Thomas Schäfer +1
We review recent studies for superconductivity using diagrammatic extensions of dynamical mean field theory. These approaches take into account simultaneously both, the local corre…
Phase diagram of nickelate superconductors calculated by dynamical vertex approximation
Karsten Held, Liang Si, Paul Worm +5
We review the electronic structure of nickelate superconductors with and without effects of electronic correlations. As a minimal model we identify the one-band Hubbard model for t…
Correlations turn electronic structure of finite-layer nickelates upside down
Paul Worm, Liang Si, Motoharu Kitatani +3
Motivated by the recent discovery of superconductivity in the pentalayer nickelate NdNiO [Nature Materials 10.1038], we calculate its electronic structure and superc…
Nematicity-enhanced superconductivity in systems with a non-Fermi liquid behavior
Sharareh Sayyad, Motoharu Kitatani, Abolhassan Vaezi +1
We explore the interplay between nematicity~(spontaneous breaking of the sixfold rotational symmetry), superconductivity, and non-Fermi liquid behavior in partially flat-band model…
Hidden, one-dimensional, strongly nested, and almost half-filled Fermi surface in BaCuO superconductors
Paul Worm, Motoharu Kitatani, Jan M. Tomczak +2
All previous cuprate superconductors display a set of common features: (i) vicinity to a Cu 3 configuration; (ii) separated CuO planes; (iii) superconductivity for dopin…
Nickelate superconductors -- a renaissance of the one-band Hubbard model
Motoharu Kitatani, Liang Si, Oleg Janson +3
Following the discovery of superconductivity in the cuprates and the seminal work by Anderson, the theoretical efforts to understand high-temperature superconductivity have been fo…
Pairing and non-Fermi liquid behavior in partially flat-band systems
Sharareh Sayyad, Edwin W. Huang, Motoharu Kitatani +4
While multiband systems are usually considered for flat-band physics, here we study one-band models that have flat portions in the dispersion to explore correlation effects in the…
Why the critical temperature of high- cuprate superconductors is so low: The importance of the dynamical vertex structure
Motoharu Kitatani, Thomas Schäfer, Hideo Aoki +1
To fathom the mechanism of high-temperature () superconductivity, the dynamical vertex approximation (DA) is evoked for the two-dimensional repulsive Hubbard model. A…
Interplay of Pomeranchuk instability and superconductivity in the two-dimensional repulsive Hubbard model
Motoharu Kitatani, Naoto Tsuji, Hideo Aoki
Interplay of Pomeranchuk instability (spontaneous symmetry breaking of the Fermi surface) and d-wave superconductivity is studied for the repulsive Hubbard model on the square latt…
FLEX+DMFT approach to the -wave superconducting phase diagram of the two-dimensional Hubbard model
Motoharu Kitatani, Naoto Tsuji, Hideo Aoki
The dynamical mean-field theory (DMFT) combined with the fluctuation exchange (FLEX) method, namely FLEX+DMFT, is an approach for correlated electron systems to incorporate both lo…