M. Ochi

activity

20142023

most citedEvidence for Magnetic Weyl Fermions in a Correlated Metal

630 citations · 3.6k across the 51 of their papers we have counts for

collaborators

Showing cond-mat.str-elShow all

15 papers · 1 filter

cond-mat.str-el2022★ 10 cited

Field-tunable Weyl points and large anomalous Hall effects in degenerate magnetic semiconductor EuMg $_{2}$ Bi $_{2}$

M. Kondo, M. Ochi, R. Kurihara +10

Magnets, with topologically-nontrivial Dirac/Weyl points, have recently attracted significant attention owing to the unconventional physical properties, such as large anomalous Hal…

cond-mat.str-el2021★ 2 cited

Simplification of the local full vertex in the impurity problem in DMFT and its applications for the nonlocal correlation

Ryota Mizuno, Masayuki Ochi, Kazuhiko Kuroki

The two-particle vertex function is crucial for the diagrammatic extensions beyond DMFT for the nonlocal fluctuation. However, estimating the two-particle quantities is still a cha…

cond-mat.str-el2021★ 18 cited

Tunable spin-valley coupling in layered polar Dirac metals

Masaki Kondo, Masayuki Ochi, Tatsuhiro Kojima +9

In non-centrosymmetric metals, spin-orbit coupling (SOC) induces momentum-dependent spin polarization at the Fermi surfaces. This is exemplified by the valley-contrasting spin pola…

cond-mat.str-el2021★ 6 cited

Development of an efficient impurity solver in dynamical mean field theory for multi-band systems: The iterative perturbation theory combined with the parquet equations

Ryota Mizuno, Masayuki Ochi, Kazuhiko Kuroki

Although several impurity solvers in the dynamical mean field theory (DMFT) have been proposed, especially in multi-band systems, there are practical difficulties arising from a tr…

cond-mat.str-el2020

Hidden Ladder in SrMoO $_{3}$ /SrTiO $_{3}$ Superlattices: Experiments and Theoretical Calculations

Hiroshi Takatsu, Naoya Yamashina, Masayuki Ochi +6

A double-layered perovskite oxide Sr $_{3}$ Mo $_{2}$ O $_{7}$ is considered a "hidden ladder" system with wide and narrow bands near the Fermi level, for which high- $T_{c}$ superconducti…

cond-mat.str-el2020★ 50 cited

Bulk quantum Hall effect of spin-valley-coupled Dirac fermions in a polar antiferromagnet BaMnSb $_{2}$

H. Sakai, H. Fujimura, S. Sakuragi +16

Unconventional features of relativistic Dirac/Weyl quasi-particles in topological materials are most evidently manifested in the 2D quantum Hall effect (QHE), whose variety is furt…

cond-mat.str-el2019

Metal-to-insulator transition in Pt-doped TiSe $_{2}$ driven by emergent network of narrow transport channels

Kyungmin Lee, Jesse Choe, Davide Iaia +13

Metal-to-insulator transitions (MIT) can be driven by a number of different mechanisms, each resulting in a different type of insulator -- Change in chemical potential can induce a…

cond-mat.str-el2019★ 7 cited

Effective interaction for vanadium oxyhydrides Sr $_{n + 1}$ V $_{n}$ O $_{2 n + 1}$ H $_{n}$ ( $n = 1$ and $n \to \infty$ ): A constrained-RPA study

Masayuki Ochi, Kazuhiko Kuroki

Transition metal oxides have been one of the central objects in the studies of electron correlation effects because of their rich variety of physical properties mainly depending on…

cond-mat.str-el2018★ 35 cited

Impact of antiferromagnetic order on Landau level splitting of quasi-two-dimensional Dirac fermions in EuMnBi $_{2}$

H. Masuda, H. Sakai, M. Tokunaga +7

We report spin-split Landau levels of quasi-two-dimensional Dirac fermions in a layered antiferromagnet EuMnBi $_{2}$ , as revealed by interlayer resistivity measurements in a tilted m…

cond-mat.str-el2018★ 166 cited

Possible correlated insulating states in magic-angle twisted bilayer graphene under strongly competing interactions

Masayuki Ochi, Mikito Koshino, Kazuhiko Kuroki

We investigate correlated insulating states in magic-angle twisted bilayer graphene (TBG) by the exact diagonalization method applied to the extended Hubbard model with interaction…

cond-mat.str-el2017★ 630 cited

Evidence for Magnetic Weyl Fermions in a Correlated Metal

K. Kuroda, T. Tomita, M. -T. Suzuki +19

Recent discovery of both gapped and gapless topological phases in weakly correlated electron systems has introduced various relativistic particles and a number of exotic phenomena…

cond-mat.str-el2017

Localized-itinerant dichotomy and unconventional magnetism in SrRu $_{2}$ O $_{6}$

Satoshi Okamoto, Masayuki Ochi, Ryotaro Arita +2

Electron correlations tend to generate local magnetic moments that usually order if the lattices are not too frustrated. The hexagonal compound SrRu $_{2}$ O $_{6}$ has a relatively high…

cond-mat.str-el2017★ 24 cited

Correlated Band Structure of a Transition Metal Oxide ZnO Obtained from a Many-Body Wave Function Theory

Masayuki Ochi, Ryotaro Arita, Shinji Tsuneyuki

Obtaining accurate band structures of correlated solids has been one of the most important and challenging problems in first-principles electronic structure calculation. There have…

cond-mat.str-el2016★ 16 cited

Strain-induced topological transition in SrRu $_{2}$ O $_{6}$ and CaOs $_{2}$ O $_{6}$

Masayuki Ochi, Ryotaro Arita, Nandini Trivedi +1

The topological property of SrRu $_{2}$ O $_{6}$ and isostructural CaOs $_{2}$ O $_{6}$ under various strain conditions is investigated using density functional theory. Based on an analysis of p…

cond-mat.str-el2015★ 48 cited

High antiferromagnetic transition temperature of a honeycomb compound SrRu $_{2}$ O $_{6}$

W. Tian, C. Svoboda, M. Ochi +8

The high temperature magnetic order in SrRu $_{2}$ O $_{6}$ was studied by measuring magnetization and neutron powder diffraction with both polarized and unpolarized neutrons. SrRu $_{2}$ O$_…

Field-tunable Weyl points and large anomalous Hall effects in degenerate magnetic semiconductor EuMg2​Bi2​

Simplification of the local full vertex in the impurity problem in DMFT and its applications for the nonlocal correlation

Tunable spin-valley coupling in layered polar Dirac metals

Development of an efficient impurity solver in dynamical mean field theory for multi-band systems: The iterative perturbation theory combined with the parquet equations

Hidden Ladder in SrMoO3​/SrTiO3​ Superlattices: Experiments and Theoretical Calculations

Bulk quantum Hall effect of spin-valley-coupled Dirac fermions in a polar antiferromagnet BaMnSb2​

Metal-to-insulator transition in Pt-doped TiSe2​ driven by emergent network of narrow transport channels

Effective interaction for vanadium oxyhydrides Srn+1​Vn​O2n+1​Hn​ (n=1 and n→∞): A constrained-RPA study

Impact of antiferromagnetic order on Landau level splitting of quasi-two-dimensional Dirac fermions in EuMnBi2​