200 citations · 861 across the 28 of their papers we have counts for
29 papers
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…
Luttinger surface and exchange splitting induced by ferromagnetic fluctuations
Motoharu Kitatani, Yusuke Nomura, Shiro Sakai +1
Ferromagnetism in the single-orbital Hubbard model, which contains only local Coulomb repulsion and no explicit ferromagnetic exchange interactions, has been extensively studied. H…
Modulated Dirac bands and integer hopping ratios in a honeycomb lattice of phenalenyl-tessellation molecules
Naoki Morishita, Kenshin Komatsu, Motoharu Kitatani +1
A family of nanographene molecules called phenalenyl-tessellation molecules (PTMs) exhibits two types of zero modes: a type that spreads over the entire…
Exploration of the potential energy surface for the conformational interconversion of the amyloid peptide at the fibril end
Yasuhiro Oishi, Motoharu Kitatani, Kichitaro Nakajima +2
The formation of amyloid fibrils comprising amyloid (A) peptides is associated with the pathology of Alzheimer's disease. In this study, we theoretically investigated the A$…
Two distinct quantum critical behaviors in the doped two-dimensional periodic Anderson model
M. Kitatani, T. Schäfer, A. A. Katanin +2
We study quantum criticality in the doped two-dimensional periodic Anderson model with the hybridization acting as a tuning parameter. Employing the dynamical vertex approximation…
Entanglement in the pseudogap regime of cuprate superconductors
Frederic Bippus, Juraj Krsnik, Motoharu Kitatani +4
We find a strongly enhanced entanglement within the pseudogap regime of the Hubbard model. This entanglement is estimated from the quantum Fisher information and, avoiding the ill-…
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…
Superconducting phase diagram of finite-layer nickelates NdNiO
Andreas Hausoel, Simone Di Cataldo, Motoharu Kitatani +2
Following the successful prediction of the superconducting phase diagram for infinite-layer nickelates, here we calculate the superconducting vs. the number of lay…
Designing a polymerized phenalenyl tessellation molecule to realize a super-honeycomb antiferromagnetic S = 3/2 spin system
Kenshin Komatsu, Naoki Morishita, Motoharu Kitatani +1
In a multiply hydrogenated polymer of phenalenyl tessellation molecules (PTMs), spatially overlapping zero modes appear, and three spin-aligned electron spins per PTM are generated…
Possible bi-stable structures of pyrene-butanoic-acid-linked protein molecules adsorbed on graphene: Theoretical study
Yasuhiro Oishi, Motoharu Kitatani, Koichi Kusakabe
We theoretically analyze possible multiple conformations of protein molecules immobilized by 1-pyrenebutanoic-acid-succinimidyl-ester (PASE) linkers on graphene. The activation bar…
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…
Natural orbital impurity solver for real-frequency properties at finite temperature
Motoharu Kitatani, Shiro Sakai, Ryotaro Arita
We extend the natural orbital impurity solver [PRB 90, 085102 (2014)] to finite temperatures and apply it to calculate spectral and transport properties of correlated electrons wit…
Anomalous transport due to Weyl fermions in the chiral antiferromagnets Mn, = Sn, Ge
Taishi Chen, Takahiro Tomita, Susumu Minami +9
The recent discoveries of strikingly large zero-field Hall and Nernst effects in antiferromagnets Mn, ( = Sn, Ge) have brought the study of magnetic topological states to…
Self-consistent ladder DA approach
Josef Kaufmann, Christian Eckhardt, Matthias Pickem +3
We present and implement a self-consistent DA approach for multi-orbital models and ab initio materials calculations. It is applied to the one-band Hubbard model at various inte…
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…