407 citations · 2.3k across the 74 of their papers we have counts for
75 papers
Microscopic calculation of coherence lengths and magnetic penetration depth in multiband superconductors
Tristan Ryoma Fuchs, Takuya Nomoto, Hikaru Watanabe +1
We present an extended Ginzburg-Landau (GL) method for calculating the superconducting coherence length and magnetic penetration depth at temperatures well below the transition tem…
Tunnel magnetoresistance effect with a Cr-doped altermagnet
Katsuhiro Tanaka, Takuya Nomoto, Ryotaro Arita
Antiferromagnets can have a finite spin-polarization in the momentum space when their magnetic structure breaks the macroscopic time-reversal symmetry. This spin-polarization can p…
Systematic Magnetic Structure Generation Based on Oriented Spin Space Groups: Formulation, Applications, and High-Throughput First-Principles Calculations
Takuya Nomoto, Kohei Shinohara, Hikaru Watanabe +1
We propose a framework for generating magnetic structures, inspired by the concept of oriented spin space groups (SSGs): magnetic structures are first generated as totally symmetri…
Entropy-assisted, long-period stacking of honeycomb layers in an AlB2-type silicide
Leonie Spitz, Takuya Nomoto, Shunsuke Kitou +8
Configurational entropy can impact crystallization processes, tipping the scales between structures of nearly equal internal energy. Using alloyed single crystals of Gd2PdSi3 in th…
Spin Models and Cluster Multipole Method: Application to Kagome Magnets
Juba Bouaziz, Takuya Nomoto, Ryotaro Arita
We present a multi-scale computational approach that combines atomistic spin models with the cluster multipole (CMP) method. The CMP method enables a systematic and accurate genera…
Symmetry-adapted closest Wannier modeling based on complete multipole basis set
Rikuto Oiwa, Akane Inda, Satoru Hayami +3
We have developed a method to construct a symmetry-adapted Wannier tight-binding model based on the closest Wannier formalism and the symmetry-adapted multipole theory. Since the s…
Approaches to tunnel magnetoresistance effect with antiferromagnets
Katsuhiro Tanaka, Takuya Nomoto, Ryotaro Arita
The tunnel magnetoresistance (TMR) effect is one of the representative phenomena in spintronics. Ferromagnets, which have a net spin polarization, have been utilized for the TMR ef…
Giant Hall effect in a highly conductive frustrated magnet GdCu
Kosuke Karube, Yoshichika Ōnuki, Taro Nakajima +10
The Hall effect is one of the most fundamental but elusive phenomena in condensed matter physics due to the rich variety of underlying mechanisms. Here we report an exceptionally l…
Topological Hall effect of Skyrmions from First Principles
Hsiao-Yi Chen, Takuya Nomoto, Max Hirschberger +1
We formulate a first-principles approach for calculating the topological Hall effect (THE) in magnets with noncollinear nanoscale spin textures. We employ a modeling method to dete…
Calculation of the biquadratic spin interactions based on the spin cluster expansion for \textit{ab initio} tight-binding models
Tatsuto Hatanaka, Juba Bouaziz, Takuya Nomoto +1
We develop a calculation scheme using \textit{ab initio} tight-binding Hamiltonians to evaluate biquadratic magnetic interactions. This approach relies on the spin cluster expansio…
First-principles study on tunnel magnetoresistance effect with Cr-doped RuO electrode
Katsuhiro Tanaka, Takuya Nomoto, Ryotaro Arita
We investigate the functionality of the -doped as an electrode of the magnetic tunnel junction (MTJ), motivated by the recent experiment showing tha…
Efficient anisotropic Migdal-Eliashberg calculations with the Intermediate Representation basis and Wannier interpolation
Hitoshi Mori, Takuya Nomoto, Ryotaro Arita +1
In this study, we combine the ab initio Migdal-Eliashberg approach with the intermediate representation for the Green's function, enabling accurate and efficient calculations of th…
Effect of collective spin excitation on electronic transport in topological spin texture
Kohei Hattori, Hikaru Watanabe, Junta Iguchi +2
We develop an efficient real-time simulation method for the spin-charge coupled system in the velocity gauge. This method enables us to compute the real-time simulation for the two…
Nernst effect of high-mobility Weyl electrons in NdAlSi enhanced by a Fermi surface nesting instability
Rinsuke Yamada, Takuya Nomoto, Atsushi Miyake +7
The thermoelectric Nernst effect of solids converts heat flow to beneficial electronic voltages. Here, using a correlated topological semimetal with high carrier mobility in pr…
High-throughput calculations of antiferromagnets hosting anomalous transport phenomena
Takuya Nomoto, Susumu Minami, Yuki Yanagi +3
We develop a high-throughput computational scheme based on cluster multipole theory to identify new functional antiferromagnets. This approach is applied to 228 magnetic compounds…
Ab initio exploration of short-pitch skyrmion materials: Role of orbital frustration
Takuya Nomoto, Ryotaro Arita
In recent years, the skyrmion lattice phase with a short lattice constant has attracted attention due to its high skyrmion density, making it a promising option for achieving high-…
Continuous crossover between insulating ferroelectrics and the polar metals: \textit{Ab initio} calculation of structural phase transitions of LiO ( = Ta, W, Re, Os)
Ryota Masuki, Takuya Nomoto, Ryotaro Arita +1
Inspired by the recent discovery of a new polar metal LiReO by K. Murayama, \textit{et al}, we calculate the temperature()-dependent crystal structures of LiO3 with =…
Ferromagnetic state with large magnetic moments realized in epitaxially strained Sr3Ru2O7 films
Ren Oshima, Tatsuto Hatanaka, Shinichi Nishihaya +6
Technical advancement of oxide molecular beam epitaxy (MBE) has opened new avenues for studying various quantum transport phenomena in correlated transition-metal oxides, as exempl…
Topological Band Inversion and Chiral Majorana Mode in Hcp Thallium
Motoaki Hirayama, Takuya Nomoto, Ryotaro Arita
The chiral Majorana fermion is an exotic particle that is its own antiparticle. It can arise in a one-dimensional edge of topological materials, and especially that in a topologica…
Bulk photovoltaic effect in antiferromagnet: Role of collective spin dynamics
Junta Iguchi, Hikaru Watanabe, Yuta Murakami +2
Inspired by recent advancements in the bulk photovoltaic effect which can extend beyond the independent particle approximation (IPA), this study delves into the influence of collec…
Algorithm for spin symmetry operation search
Kohei Shinohara, Atsushi Togo, Hikaru Watanabe +3
A spin space group provides a suitable way to fully exploit the symmetry of a spin arrangement with a negligible spin-orbit coupling. There has been a growing interest in applying…
Symmetry analysis with spin crystallographic groups: Disentangling effects free of spin-orbit coupling in emergent electromagnetism
Hikaru Watanabe, Kohei Shinohara, Takuya Nomoto +2
Recent studies identified spin-order-driven phenomena such as spin-charge interconversion without relying on the relativistic spin-orbit interaction. Those physical properties can…
High-performance descriptor for magnetic materials: Accurate discrimination of magnetic structure
Michi-To Suzuki, Takuya Nomoto, Eiaki V. Morooka +2
The magnetic structure is crucial in determining the physical properties inherent in magnetic compounds. We present an adequate descriptor for magnetic structure with proper magnet…
Spontaneous topological Hall effect induced by non-coplanar antiferromagnetic order in intercalated van der Waals materials
H. Takagi, R. Takagi, S. Minami +14
In ferromagnets, electric current generally induces transverse Hall voltage in proportion to magnetization (anomalous Hall effect), and it is frequently used for electrical readout…