M. Ochi

activity

20192026

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 · 302 across the 22 of their papers we have counts for

collaborators

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11 papers · 1 filter

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

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

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.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.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.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.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…

cond-mat.supr-con2023★ 62 cited

Pair correlations in the two-orbital Hubbard ladder: Implications on superconductivity in the bilayer nickelate La $_{3}$ Ni $_{2}$ O $_{7}$

Tatsuya Kaneko, Hirofumi Sakakibara, Masayuki Ochi +1

Motivated by high-temperature superconductivity in pressurized La $_{3}$ Ni $_{2}$ O $_{7}$ , we investigate the pair correlations in the two-orbital Hubbard ladder, which consists of the near…

cond-mat.supr-con2023★ 135 cited

Theoretical analysis on the possibility of superconductivity in a trilayer Ruddlesden-Popper nickelate La $_{4}$ Ni $_{3}$ O $_{10}$ under pressure and its experimental examination: comparison with La $_{3}$ Ni $_{2}$ O $_{7}$

Hirofumi Sakakibara, Masayuki Ochi, Hibiki Nagata +9

We study the possibility of superconductivity in a trilayer Ruddlesden-Popper nickelate La $_{4}$ Ni $_{3}$ O $_{10}$ under pressure both theoretically and experimentally, making comparison…

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

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

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

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

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

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

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

Pair correlations in the two-orbital Hubbard ladder: Implications on superconductivity in the bilayer nickelate La3​Ni2​O7​

Theoretical analysis on the possibility of superconductivity in a trilayer Ruddlesden-Popper nickelate La4​Ni3​O10​ under pressure and its experimental examination: comparison with La3​Ni2​O7​