53 citations · 289 across the 40 of their papers we have counts for
40 papers
General Strategy for Large Nernst Coefficient
Junya Endo, Hiroyasu Matsuura, Manfred Sigrist +1
We propose a general strategy for enhancing the anomalous Nernst coefficient based on the Sommerfeld-Bethe relation. This approach provides a systematic framework for understanding…
Electrical and thermal magnetotransport and the Wiedemann-Franz law in semimetals with electron-electron scattering
Keigo Takahashi, Hiroyasu Matsuura, Hideaki Maebashi +1
We study the electrical and thermal transport properties and the violation of the Wiedemann-Franz (WF) law of two-carrier semimetals using exact treatments of the Boltzmann equatio…
Orbital magnetic susceptibility of type-I, II, and III massless Dirac fermions in two dimensions
Tomonari Mizoguchi, Hiroyasu Matsuura, Masao Ogata
We study the orbital magnetic susceptibility of tilted massless Dirac fermions in two dimensions. It is well-known that the type-I massless Dirac fermions exhibit divergingly-large…
Orbital paramagnetism without density of states enhancement in nodal-line semimetal ZrSiS
Soshun Ozaki, Hiroyasu Matsuura, Ikuma Tateishi +2
Unconventional orbital paramagnetism without enhanced density of states was recently discovered in the nodal-line semimetal ZrSiS. We propose a novel interband mechanism, linked to…
Phonon Drag Effect in Nernst and Thermal Hall Effects: General Theory and Application to Dilute Metal SrTiO
Junya Endo, Hiroyasu Matsuura, Masao Ogata
In magnetic fields, thermal gradient-induced effects such as the Nernst and thermal Hall effects are significantly influenced by phonon drag, which works in conjunction with the fo…
Theoretical analysis of anisotropic upper critical field of superconductivity in nodal-line semimetals
Junya Endo, Hiroyasu Matsuura, Masao Ogata
We study the properties of the upper critical field of superconductivity in nodal-line semimetals in a continuous model, which has a nodal-line on the plane. Using the…
Thermoelectric properties in semimetals with inelastic electron-hole scattering
Keigo Takahashi, Hiroyasu Matsuura, Hideaki Maebashi +1
We present systematic theoretical results on thermoelectric effects in semimetals based on the variational method of the linearized Boltzmann equation. Inelastic electron-hole scat…
Data-driven reconstruction of spectral conductivity and chemical potential from thermoelectric transport data
Tomoki Hirosawa, Frank Schäfer, Hideaki Maebashi +2
The spectral conductivity, i.e., the electrical conductivity as a function of the Fermi energy, is a cornerstone in determining the thermoelectric transport properties of electrons…
Flux roughening in spin ice with mixed interactions
Masaki Kato, Hiroyasu Matsuura, Masafumi Udagawa +1
Spin ice presents a typical example of classical spin liquid, where conserved magnetic fluxes emerge from microscopic spin degrees of freedom. In this letter, we investigate the ef…
Anomalous Spin Transport Properties of Gapped Dirac Electrons with Tilting
Masao Ogata, Soshun Ozaki, Hiroyasu Matsuura
The anomalous spin transport coefficients of gapped Dirac electrons are studied with application to a quasi-two-dimensional organic conductor -(BETS)I in mind. In the pr…
Disentangling Orbital Magnetic Susceptibility with Wannier Functions
Toshikaze Kariyado, Hiroyasu Matsuura, Masao Ogata
Orbital magnetic susceptibility involves rich physics such as interband effects despite of its conceptual simplicity. In order to appreciate the rich physics related to the orbital…
Theory of Huge Thermoelectric Effect Based on Magnon Drag Mechanism: Application to Thin-Film Heusler Alloy
Hiroyasu Matsuura, Masao Ogata, Takao Mori +1
To understand the unexpectedly high thermoelectric performance observed in the thin-film Heusler alloy FeVWAl, we study the magnon drag effect, generated by the…
Thin Films of Topological Nodal Line Semimetals as a Candidate for Efficient Thermoelectric Converters
Masashi Hosoi, Ikuma Tateishi, Hiroyasu Matsuura +1
Thermoelectric materials intrigue much interest due to their wide range of application such as power generators and refrigerators. The efficiency of thermoelectric materials is qua…
Nodal-line semimetal HMTSF-TCNQ: Anomalous orbital diamagnetism and charge density wave
S. Ozaki, I. Tateishi, H. Matsuura +2
This study investigates the electronic states and physical quantities of an organic charge-transfer complex HMTSF-TCNQ, which undergoes a charge-density-wave (CDW) phase transition…
Thermoelectric transport of type-I, II, and III massless Dirac fermions in two-dimensional lattice model
Tomonari Mizoguchi, Hiroyasu Matsuura, Masao Ogata
We study longitudinal electric and thermoelectric transport coefficients of Dirac fermions on a simple lattice model where tuning of a single parameter enables us to change the typ…
Effect of paramagnon drag on thermoelectric transport properties: Linear response theory
Junya Endo, Hiroyasu Matsuura, Masao Ogata
It has been proposed that paramagnetic materials exhibit a unique thermoelectric effect near the ferromagnetic transition point due to spin fluctuations. This phenomenon is often r…
Theory of Thermal Conductivity on Excitonic Insulator
S. Takarada, M. Ogata, H. Matsuura
We study the thermal conductivity in the excitonic insulator using a simple quasi one-dimensional two-band model consisting of electron and hole bands with the Coulomb interactions…
Magnetic Switching by Oxygen Adsorption in Metal-Organic Framework Systems
Masaki Kato, Kunio Tokushuku, Hiroyasu Matsuura +2
In this letter, we address magnetization switching by oxygen adsorption in porous metal-organic framework systems. To this end, we construct a simple localized spin model combined…
Characteristic singular behaviors of nodal line materials emerging in orbital magnetic susceptibility and Hall conductivity
Ikuma Tateishi, Viktor Könye, Hiroyasu Matsuura +1
The bulk properties of nodal line materials have been an important research topic in recent years. In this paper, we study the orbital magnetic susceptibility and the Hall conducti…
Theory for Anomalous NMR Response in Pb_{1-x}Tl_{x}Te on Charge Kondo Effect
Kazumasa Miyake, Hiroyasu Matsuura
A theory for anomalous enhancement of NMR relaxation rate of Te toward zero temperature observed in PbTlTe (=0.01) is presented on the idea of t…
New magnetic phases on chiral magenet CsCuCl under high pressures
Masashi Hosoi, Hiroyasu Matsuura, Masao Ogata
We study a magnetic phase diagram of CsCuCl3 by a spin wave theory. We clarify an existence of new magnetic phases, i.e. up-up-down (uud) phase and Y coplanar phase under a high pr…
Dzyaloshinskii-Moriya Interaction between Multipolar Moments in Systems
Masashi Hosoi, Tomonari Mizoguchi, Taichi Hinokihara +2
We propose a new type of Dzyaloshinskii-Moriya (DM) interactions which act on high-rank multipolar moments such as quadrupolar and octupolar moments. Here we consider 5d1 systems w…
Face centered cubic SnSe as a trivial Dirac nodal line material
Ikuma Tateishi, Hiroyasu Matsuura
The presence of a Dirac nodal line in a time-reversal and inversion symmetric system is dictated by the index when spin-orbit interaction is absent. In a first princ…
Magnetic Chirality Induced from Ruderman-Kittel-Kasuya-Yosida Interaction at an Interface of a Ferromagnet/Heavy Metal Heterostructure
Taira Shibuya, Hiroyasu Matsuura, Masao Ogata
We study a microscopic derivation and the properties of the Dzyaloshinskii-Moriya interaction (DMI) between local magnetic moments in ferromagnet/heavy metal heterostructures. Firs…