N. Ogawa
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View article: Emergence of ferroelectric topological insulator as verified by quantum Hall effect of surface states in (Sn,Pb,In)Te films
Emergence of ferroelectric topological insulator as verified by quantum Hall effect of surface states in (Sn,Pb,In)Te films Open
Emergent phenomena arising from nontrivial band structures based on topology and symmetry have been attracting keen interest in contemporary condensed-matter physics. Materials such as SnTe and PbTe are one such example, which demonstrate …
View article: Strongly enhanced shift current at exciton resonances in a noncentrosymmetric wide-gap semiconductor
Strongly enhanced shift current at exciton resonances in a noncentrosymmetric wide-gap semiconductor Open
Excitons are fundamental quasiparticles that are ubiquitous in photoexcited semiconductors and insulators. Despite causing a sharp and strong photoabsorption near the interband absorption edge, charge-neutral excitons do not yield photocur…
View article: Chronic Illness and visiting clinic before hospitalization at the onset of Stroke: Shiga Registry
Chronic Illness and visiting clinic before hospitalization at the onset of Stroke: Shiga Registry Open
Background Prompt action at stroke onset is required to improve prognosis. Some previous studies indicated that visiting local clinics may initially delay access to specialized care. We examined the relationship between the presence of chr…
View article: Bovine Lactoferrin Promotes Neurite Outgrowth in PC12 Cells via the TrkA Receptor
Bovine Lactoferrin Promotes Neurite Outgrowth in PC12 Cells via the TrkA Receptor Open
Lactoferrin (LF) is a multifunctional protein abundant in breast milk that modulates the functions of neural stem cells. Recent studies have demonstrated the efficacy of bovine LF (bLF) in mitigating behavioral changes; however, the molecu…
View article: Electric-field-enhanced second-harmonic domain contrast and nonreciprocity in a van der Waals antiferromagnet
Electric-field-enhanced second-harmonic domain contrast and nonreciprocity in a van der Waals antiferromagnet Open
Imaging antiferromagnetic 180° domains with actively controlled visibility is vital for both fundamental science and sophisticated applications. While optical second-harmonic generation (SHG) is a well-known technique for distinguishing su…
View article: Superconducting diode effect under time-reversal symmetry
Superconducting diode effect under time-reversal symmetry Open
In noncentrosymmetric superconductors, superconducting and normal conductions can interchange on the basis of the current flow direction. This effect is termed a superconducting diode effect (SDE), which is a focal point of recent research…
View article: Superconducting diode effect under time reversal symmetry
Superconducting diode effect under time reversal symmetry Open
In noncentrosymmetric superconductors, superconducting and normal conductions can interchange based on the current flow direction. This effect is termed a superconducting diode effect (SDE), which is a focal point of recent research. The b…
View article: Odd-parity multipole order in the spin-orbit coupled metallic pyrochlore <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi mathvariant="normal">P</mml:mi><mml:msub><mml:mi mathvariant="normal">b</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi mathvariant="normal">R</mml:mi><mml:msub><mml:mi mathvariant="normal">e</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mrow><mml:mn>7</mml:mn><mml:mo>−</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>
Odd-parity multipole order in the spin-orbit coupled metallic pyrochlore Open
The pyrochlore oxide Pb2Re2O7-{\\delta} (PRO) is a candidate\nspin-orbit-coupled metal (SOCM) that exhibits a structural phase transition\nwith inversion symmetry breaking. In this study, we report the results of\ndetailed X-ray diffractio…
View article: Giant Modulation of the Second Harmonic Generation by Magnetoelectricity in Two‐Dimensional Multiferroic CuCrP<sub>2</sub>S<sub>6</sub>
Giant Modulation of the Second Harmonic Generation by Magnetoelectricity in Two‐Dimensional Multiferroic CuCrP<sub>2</sub>S<sub>6</sub> Open
Multiferroic materials have attracted considerable attention owing to their unique magnetoelectric or magnetooptical properties. The recent discovery of few‐layer van der Waals multiferroic crystals provides a new research direction for co…
View article: Electric-field-enhanced second-harmonic domain contrast and nonreciprocity in a van der Waals antiferromagnet
Electric-field-enhanced second-harmonic domain contrast and nonreciprocity in a van der Waals antiferromagnet Open
Imaging antiferromagnetic 180° domains with actively controlled visibility is vital for both fundamental science and sophisticated applications. While optical second-harmonic generation (SHG) is a well-known technique for distinguishing su…
View article: Emergent zero-field anomalous Hall effect in a reconstructed rutile antiferromagnetic metal
Emergent zero-field anomalous Hall effect in a reconstructed rutile antiferromagnetic metal Open
View article: Exciton-magnon splitting in the van der Waals antiferromagnet <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>MnPS</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math> unveiled by second-harmonic generation
Exciton-magnon splitting in the van der Waals antiferromagnet unveiled by second-harmonic generation Open
Exciton-magnon pairwise excitation is promising to realize the direct and efficient photogeneration of magnons, especially in low-dimensional materials with large quasiparticle scattering cross sections. Using resonant second-harmonic gene…
View article: Anomalous charge transport upon quantum melting of chiral spin order
Anomalous charge transport upon quantum melting of chiral spin order Open
A plethora of correlated and exotic metallic states have been identified on the border of itinerant magnetism, where the long-range spin texture is melted by tuning the magnetic transition temperature (T$_C$) towards zero, referred to as t…
View article: Emergent zero-field anomalous Hall effect in a reconstructedrutileantiferromagnetic metal
Emergent zero-field anomalous Hall effect in a reconstructedrutileantiferromagnetic metal Open
Anomalous Hall effect (AHE) emerged in antiferromagnetic metals shows intriguing physics and application potential. In contrast to certain noncollinear antiferromagnets, rutile RuO$_2$ has been proposed recently to exhibit a crystal-assist…
View article: Artificially controlled nanoscale chemical reduction in VO2 through electron beam illumination
Artificially controlled nanoscale chemical reduction in VO2 through electron beam illumination Open
View article: Exciton-magnon splitting in van der Waals antiferromagnet MnPS$_3$ unveiled by second-harmonic generation
Exciton-magnon splitting in van der Waals antiferromagnet MnPS$_3$ unveiled by second-harmonic generation Open
Ultrafast and coherent generation of magnons is of great significance for high-speed antiferromagnetic spintronics. One possible route is by exciton-magnon pairwise optical excitation. To date, such exciton-magnon transitions have been stu…
View article: Soft hair, dressed coordinates and information loss paradox
Soft hair, dressed coordinates and information loss paradox Open
Understanding the dynamics of soft hair might shine some light on the information loss paradox. In this paper, we introduce a new coordinate system, dressed coordinates, in order to analyze the quantum states of Hawking radiation as a firs…
View article: CCDC 2239439: Experimental Crystal Structure Determination
CCDC 2239439: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Pattern recognition with neuromorphic computing using magnetic field–induced dynamics of skyrmions
Pattern recognition with neuromorphic computing using magnetic field–induced dynamics of skyrmions Open
Nonlinear phenomena in physical systems can be used for brain-inspired computing with low energy consumption. Response from the dynamics of a topological spin structure called skyrmion is one of the candidates for such a neuromorphic compu…
View article: Manual Control Mode for Autonomous Mobile Robots Using Velocity-Based Impedance Control
Manual Control Mode for Autonomous Mobile Robots Using Velocity-Based Impedance Control Open
In this industry-oriented research and development project, we studied the introduction and implementation of autonomous mobile robots (AMRs) for transporting equipment and parts in manufacturing facilities of aircraft equipment. In the re…
View article: CCDC 1994056: Experimental Crystal Structure Determination
CCDC 1994056: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 1994053: Experimental Crystal Structure Determination
CCDC 1994053: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 1994054: Experimental Crystal Structure Determination
CCDC 1994054: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 1994055: Experimental Crystal Structure Determination
CCDC 1994055: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Photovoltaic effect by soft phonon excitation
Photovoltaic effect by soft phonon excitation Open
Significance The quantum-mechanical geometric phase of electrons provides various phenomena such as the dissipationless photocurrent generation through the shift current mechanism. So far, the photocurrent generations are limited to above …
View article: Ellagic Acid Combined with Tacrolimus Showed Synergistic Cell Growth Inhibition in Fission Yeast
Ellagic Acid Combined with Tacrolimus Showed Synergistic Cell Growth Inhibition in Fission Yeast Open
Calcineurin (CN) is a conserved Ca2+-calmodulin activated protein phosphatase, which plays important roles in immune regulation, cardiac hypertrophy, and apoptosis in humans. In pathogenic fungi, CN is essential for stress survi…
View article: Fabrication of Transparent and Conductive SWCNT/SiO2 Composite Thin-Film by Photo-Irradiation of Molecular Precursor Films
Fabrication of Transparent and Conductive SWCNT/SiO2 Composite Thin-Film by Photo-Irradiation of Molecular Precursor Films Open
A single-walled carbon nanotube (SWCNT)-silica composite thin film on a quartz glass was formed by ultraviolet irradiation (20–40 °C) onto a spin-coated precursor film. With 7.4 mass% SWCNTs, the electrical resistivity reached 7.7 × 10−3 Ω…
View article: CCDC 1989276: Experimental Crystal Structure Determination
CCDC 1989276: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Berry curvature generation detected by Nernst responses in ferroelectric Weyl semimetal
Berry curvature generation detected by Nernst responses in ferroelectric Weyl semimetal Open
Significance An ideal Weyl semimetal with high tunability is an undoubtedly important platform for realizing and manipulating exotic quantum properties of topological semimetals. Currently, all the existing nonmagnetic Weyl semimetals are …
View article: Writing of strain-controlled multiferroic ribbons into MnWO4
Writing of strain-controlled multiferroic ribbons into MnWO4 Open
Local and low-dimensional structures, such as interfaces, domain walls and structural defects, may exhibit physical properties different from the bulk. Therein, a wide variety of local phases were discovered including conductive interfaces…