K. Kuroki

activity

20162026

most citedTheoretical analysis on the possibility of superconductivity in a trilayer Ruddlesden-Popper nickelate La

_{4}

_{3}

_{10}

under pressure and its experimental examination: comparison with La

_{3}

_{2}

_{7}

135 citations · 362 across the 28 of their papers we have counts for

collaborators

28 papers

cond-mat.str-el2026

Orbital-Selective Coexistence of Interlayer Spin-Singlet Formation and SDW Order with Anomalous Spin Reconfiguration in Bilayer Nickelate La $_{3}$ Ni $_{2}$ O $_{7}$ Revealed by $^{17}$ O-NMR

H. Lee, M. Yashima, M. Kakoi +7

The spin structure of the spin density wave (SDW) order in the bilayer nickelate La $_{3}$ Ni $_{2}$ O $_{7}$ has been investigated using site-selective $^{17}$ O-NMR measurements on the inner…

cond-mat.str-el2026

Fluctuation exchange study on the electron-hole asymmetry of the superconductivity across 1/3 filling in the trilayer Hubbard model

Yushi Yamada, Masataka Kakoi, Masayuki Ochi +1

We study within the fluctuation exchange approximation the trilayer Hubbard model where three layers of the Hubbard model are coupled by large interlayer hoppings so that the overl…

cond-mat.supr-con2026

Superconductivity in doped spin multimer systems

Ritsuki Hirabayashi, Masataka Kakoi, Ryota Ueda +2

Binding energy, which quantifies pair formation, is a key factor in the emergence of superconductivity. Here, we show that even when multiple spins are complexly coupled, hole-dope…

cond-mat.str-el2026

Study on the validity of IPT+parquet method as an impurity solver in DMFT focusing on orbital fluctuations

Aira Yamada, Ryota Mizuno, Masayuki Ochi +2

A breakdown of calculations with exact impurity solvers in the dynamical mean field theory in multiband systems easily occurs due to the expensive numerical cost. To overcome this…

cond-mat.supr-con2026

Theoretical study of superconductivity in freestanding infinite-layer nickelate membranes under pressure: mitigation of excess correlation enhances $T_{c}$

Mahiru Seki, Reo Kono, Naotaka Tanaka +5

We theoretically investigate a freestanding membrane of infinite-layer nickelate Nd $_{0.85}$ Sr $_{0.15}$ NiO $_{2}$ under pressure by constructing a seven-orbital effective model based…

cond-mat.supr-con2026

Pairing properties of correlated three-leg ladders with strong interchain couplings near 1/3 filling

Yushi Yamada, Tatsuya Kaneko, Masataka Kakoi +2

We investigate the ground-state properties of correlated three-leg ladders near 1/3 filling. We apply the density-matrix renormalization group method to the three-leg t-J ladder wi…

cond-mat.supr-con2026

Nonlinear phononics in LaFeAsO: Optical control of the crystal structure toward possible enhancement of superconductivity

Shu Kamiyama, Tatsuya Kaneko, Kazuhiko Kuroki +1

Nonlinear phononics provides a route to control crystal structures through light-induced phonon excitation. In this study, we apply nonlinear phononics to an iron-based superconduc…

cond-mat.supr-con2025

Finite-Temperature $ab initio$ Structural Optimization of the Bilayer Nickelate Superconductor La $_{3}$ Ni $_{2}$ O $_{7}$

Ryoma Asai, Ryotaro Arita, Takumi Chida +3

We develop a first-principles framework for finite-temperature structural optimization that incorporates vibrational contributions to the free energy through anharmonic phonon theo…

cond-mat.supr-con2025

Theoretical study on ambient pressure superconductivity in La $_{3}$ Ni $_{2}$ O $_{7}$ thin films : structural analysis, model construction, and robustness of $s \pm$ -wave pairing

Kensei Ushio, Shu Kamiyama, Yuto Hoshi +4

We theoretically study ambient pressure superconductivity in thin films of La $_{3}$ Ni $_{2}$ O $_{7}$ . We construct model Hamiltonians adopting the crystal structure theoretically determine…

cond-mat.str-el2025

Improvement of the simplification method for the local two-particle full-vertex towards precise frequency behavior

Ryota Mizuno, Kazuhiko Kuroki, Masayuki Ochi

Estimating the local two-particle vertex functions, which are crucial for capturing the spatial fluctuation of the effective field beyond the single-site DMFT, is still challenging…

cond-mat.str-el2025★ 8 cited

$t$ - $J$ model for strongly correlated two-orbital systems: Application to bilayer nickelate superconductors

Tatsuya Kaneko, Masataka Kakoi, Kazuhiko Kuroki

We derive a $t$ - $J$ model applicable to strongly correlated two-orbital systems including bilayer nickelate superconductors. Using the Schrieffer-Wolff transformation, we exclude t…

cond-mat.str-el2025★ 1 cited

Doublon-Holon Pairing State in Photodoped Mott Insulators

Ryota Ueda, Madhumita Sarkar, Zala Lenarčič +3

We demonstrate the existence of an unconventional pairing state in photodoped Mott insulators on ladder and quasi-two-dimensional geometries, characterized by quasi-long-range doub…

cond-mat.mtrl-sci2025

Possible high thermoelectric power factor in alkali-metal-intercalated BC $_{3}$ : anisotropic multiple valleys originating from the van Hove singularity of graphene

Ryutaro Enami, Kazuhiko Kuroki, Masayuki Ochi

We theoretically investigate the electronic structure of monolayer BC $_{3}$ and find that it hosts anisotropic multiple valleys originating from the splitting of the van Hove singula…

cond-mat.mtrl-sci2025★ 1 cited

First-principles Study of Metallic-atom Diffusion in Thermoelectric Material Mg $_{3}$ Sb $_{2}$

Masayuki Ochi, Kazutaka Nishiguchi, Chul-Ho Lee +1

Mg $_{3}$ Sb $_{2}$ is a promising thermoelectric material that consists of nontoxic and earth-abundant elements. We investigate metallic-atom diffusion in Mg $_{3}$ Sb $_{2}$ by calculating the…

cond-mat.str-el2025★ 6 cited

Nonreciprocal charge transport in polar Dirac metals with tunable spin-valley coupling

M. Kondo, M. Kimata, M. Ochi +7

Nonreciprocal charge transport in solids, where resistance is different between rightward and leftward currents, is a key function of rectifying devices in the modern electronics,…

cond-mat.supr-con2025★ 3 cited

Optical control of the crystal structure in the bilayer nickelate superconductor La3Ni2O7 via nonlinear phononics

Shu Kamiyama, Tatsuya Kaneko, Kazuhiko Kuroki +1

Superconductivity in the bilayer nickelate La $_{3}$ Ni $_{2}$ O $_{7}$ occurs when the interlayer Ni-O-Ni bond angle becomes straight under pressure, suggesting a strong relationship between…

cond-mat.str-el2024★ 1 cited

Floquet engineering of effective pairing interactions in a doped band insulator

Yugo Takahashi, Hideo Miyamoto, Kazuhiko Kuroki +1

We investigate the pairing state in a doped band insulator under a periodic driving field. We employ a correlated fermionic model on a honeycomb lattice, in which pairing glue is o…

cond-mat.supr-con2024★ 8 cited

Theoretical study of the crystal structure of the bilayer nickel oxychloride Sr $_{3}$ Ni $_{2}$ O $_{5}$ Cl $_{2}$ and analysis of possible unconventional superconductivity

Masayuki Ochi, Hirofumi Sakakibara, Hidetomo Usui +1

The discovery of superconductivity under high pressure with $T_{c}$ exceeding 80 K in a bilayer nickelate La $_{3}$ Ni $_{2}$ O $_{7}$ has led to a strong desire to realize similar high $T_{c}$ p…

cond-mat.supr-con2024★ 7 cited

Theoretical study of spin-fluctuation-mediated superconductivity in two-dimensional Hubbard models with an incipient flat band

Tetsuaki Aida, Karin Matsumoto, Daisuke Ogura +2

One promising way to enhance superconductivity is to have coexisting wide and incipient narrow bands, where the Fermi level intersecting the wide band lies just above the narrow ba…

cond-mat.str-el2024★ 2 cited

Ground-State Properties of the $t$ - $J$ Model for the CuO Double-Chain Structure

Tatsuya Kaneko, Satoshi Ejima, Koudai Sugimoto +1

We investigate the ground-state properties of a correlated model for the double-chain structure in cuprates. We consider the $t$ - $J$ model, in which the nearest-neighbor spin inter…

cond-mat.supr-con2024★ 2 cited

Theoretical study on the possibility of high $T_{c}$ s $\pm$ -wave superconductivity in the heavily hole-doped infinite layer nickelates

Hirofumi Sakakibara, Ryota Mizuno, Masayuki Ochi +2

We theoretically propose a possibility of realizing high $T_{c}$ superconductivity having $s \pm$ -wave symmetry in the heavily hole-doped infinite layer nickelates La $_{1 - x}$ Sr $_{x}$ NiO…

cond-mat.supr-con2024

Theoretical analysis of the origin of the double-well band dispersion in the CuO double chains of Pr $_{2}$ Ba $_{4}$ Cu $_{7}$ O $_{15 - δ}$ and its impact on superconductivity

Toshiki Yagi, Masayuki Ochi, Kazuhiko Kuroki

Pr $_{2}$ Ba $_{4}$ Cu $_{7}$ O $_{15 - δ}$ is a unique member of cuprate superconductors where many studies suggest that CuO double chains are responsible for superconductivity. One characterist…

cond-mat.str-el2023★ 73 cited

Multiband Metallic Ground State in Multilayered Nickelates La $_{3}$ Ni $_{2}$ O $_{7}$ and La $_{4}$ Ni $_{3}$ O $_{10}$ Probed by $^{139}$ La-NMR at Ambient Pressure

Masataka Kakoi, Takashi Oi, Yujiro Ohshita +9

We report a $^{139}$ La-NMR study of polycrystalline samples of multi( $n$ )-layered nickelates, La $_{3}$ Ni $_{2}$ O $_{7 - δ}$ ( $n = 2$ ) and La $_{4}$ Ni $_{3}$ O $_{10 - δ}$ ( $n = 3$ ), at ambient pressure.…

cond-mat.supr-con2023★ 35 cited

Pair correlations of the hybridized orbitals in a ladder model for the bilayer nickelate La $_{3}$ Ni $_{2}$ O $_{7}$

Masataka Kakoi, Tatsuya Kaneko, Hirofumi Sakakibara +2

To clarify the nature of high-temperature superconductivity in the bilayer nickelate La $_{3}$ Ni $_{2}$ O $_{7}$ under pressure, we investigate, using the density-matrix renormalization grou…

Orbital-Selective Coexistence of Interlayer Spin-Singlet Formation and SDW Order with Anomalous Spin Reconfiguration in Bilayer Nickelate La3​Ni2​O7​ Revealed by 17O-NMR

Fluctuation exchange study on the electron-hole asymmetry of the superconductivity across 1/3 filling in the trilayer Hubbard model

Superconductivity in doped spin multimer systems

Study on the validity of IPT+parquet method as an impurity solver in DMFT focusing on orbital fluctuations

Theoretical study of superconductivity in freestanding infinite-layer nickelate membranes under pressure: mitigation of excess correlation enhances Tc​

Pairing properties of correlated three-leg ladders with strong interchain couplings near 1/3 filling

Nonlinear phononics in LaFeAsO: Optical control of the crystal structure toward possible enhancement of superconductivity

Finite-Temperature ab initio Structural Optimization of the Bilayer Nickelate Superconductor La3​Ni2​O7​

Theoretical study on ambient pressure superconductivity in La3​Ni2​O7​ thin films : structural analysis, model construction, and robustness of s±-wave pairing

Improvement of the simplification method for the local two-particle full-vertex towards precise frequency behavior

t-J model for strongly correlated two-orbital systems: Application to bilayer nickelate superconductors

Doublon-Holon Pairing State in Photodoped Mott Insulators

Possible high thermoelectric power factor in alkali-metal-intercalated BC3​: anisotropic multiple valleys originating from the van Hove singularity of graphene

First-principles Study of Metallic-atom Diffusion in Thermoelectric Material Mg3​Sb2​

Nonreciprocal charge transport in polar Dirac metals with tunable spin-valley coupling

Optical control of the crystal structure in the bilayer nickelate superconductor La3Ni2O7 via nonlinear phononics

Floquet engineering of effective pairing interactions in a doped band insulator

Theoretical study of the crystal structure of the bilayer nickel oxychloride Sr3​Ni2​O5​Cl2​ and analysis of possible unconventional superconductivity

Theoretical study of spin-fluctuation-mediated superconductivity in two-dimensional Hubbard models with an incipient flat band

Ground-State Properties of the t-J Model for the CuO Double-Chain Structure

Theoretical study on the possibility of high Tc​ s±-wave superconductivity in the heavily hole-doped infinite layer nickelates

Theoretical analysis of the origin of the double-well band dispersion in the CuO double chains of Pr2​Ba4​Cu7​O15−δ​ and its impact on superconductivity

Multiband Metallic Ground State in Multilayered Nickelates La3​Ni2​O7​ and La4​Ni3​O10​ Probed by 139La-NMR at Ambient Pressure

Pair correlations of the hybridized orbitals in a ladder model for the bilayer nickelate La3​Ni2​O7​

Orbital-Selective Coexistence of Interlayer Spin-Singlet Formation and SDW Order with Anomalous Spin Reconfiguration in Bilayer Nickelate La $_{3}$ Ni $_{2}$ O $_{7}$ Revealed by $^{17}$ O-NMR

Theoretical study of superconductivity in freestanding infinite-layer nickelate membranes under pressure: mitigation of excess correlation enhances $T_{c}$

Finite-Temperature $ab initio$ Structural Optimization of the Bilayer Nickelate Superconductor La $_{3}$ Ni $_{2}$ O $_{7}$

Theoretical study on ambient pressure superconductivity in La $_{3}$ Ni $_{2}$ O $_{7}$ thin films : structural analysis, model construction, and robustness of $s \pm$ -wave pairing

$t$ - $J$ model for strongly correlated two-orbital systems: Application to bilayer nickelate superconductors

Possible high thermoelectric power factor in alkali-metal-intercalated BC $_{3}$ : anisotropic multiple valleys originating from the van Hove singularity of graphene

First-principles Study of Metallic-atom Diffusion in Thermoelectric Material Mg $_{3}$ Sb $_{2}$

Theoretical study of the crystal structure of the bilayer nickel oxychloride Sr $_{3}$ Ni $_{2}$ O $_{5}$ Cl $_{2}$ and analysis of possible unconventional superconductivity

Ground-State Properties of the $t$ - $J$ Model for the CuO Double-Chain Structure

Theoretical study on the possibility of high $T_{c}$ s $\pm$ -wave superconductivity in the heavily hole-doped infinite layer nickelates

Theoretical analysis of the origin of the double-well band dispersion in the CuO double chains of Pr $_{2}$ Ba $_{4}$ Cu $_{7}$ O $_{15 - δ}$ and its impact on superconductivity

Multiband Metallic Ground State in Multilayered Nickelates La $_{3}$ Ni $_{2}$ O $_{7}$ and La $_{4}$ Ni $_{3}$ O $_{10}$ Probed by $^{139}$ La-NMR at Ambient Pressure

Pair correlations of the hybridized orbitals in a ladder model for the bilayer nickelate La $_{3}$ Ni $_{2}$ O $_{7}$