70 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Kyoto UniversityJP10 papers
- Kyushu UniversityJP10 papers
- Hiroshima UniversityJP4 papers
- RIKENJP4 papers
- Xinjiang UniversityCN4 papers
- Chungbuk National UniversityKR3 papers
- Institute for Basic ScienceKR3 papers
- The University of TokyoJP3 papers
- Japan Atomic Energy AgencyJP2 papers
- Kobe UniversityJP2 papers
- Kumamoto UniversityJP2 papers
- National Astronomical Observatory of JapanJP2 papers
24 papers
Metallisation of the Mott Insulator CaRuO using Electric Double-Layer Gating
Tatsuhiro Sakami, Hiroki Ogura, Akihiro Ino +3
To verify whether the Mott insulator Ca2RuO4 can be switched by applying electric-field alone, regardless of current flow, we employ metallisation using electric double-layer gatin…
Challenges in extracting nonlinear current-induced phenomena in Ca2RuO4
Giordano Mattoni, Kazumi Fukushima, Shingo Yonezawa +2
An appealing direction to change the properties of strongly correlated materials is to induce nonequilibrium steady states by the application of a direct current. While access to t…
Unique Itinerant Ferromagnetism in 4d-electron System Ca2RuO4
Fumihiko Nakamura, Hiroki Ogura, Tatsuhiro Sakami +1
We have studied the magnetic properties of pressure-induced ferromagnet Ca2RuO4 to reveal the uniqueness of the 4d-electron ferromagnetism in the quasi-two-dimensional conductor. T…
Impacts of the direct URCA and Superfluidity inside a Neutron Star on Type-I X-Ray Bursts and X-Ray Superbursts
Akira Dohi, Nobuya Nishimura, Hajime Sotani +4
We investigate the impacts of neutrino cooling mechanism inside the neutron star (NS) core on the light curves of type-I X-ray bursts and X-ray superbursts. From several observatio…
Keldysh space control of charge dynamics in a strongly driven Mott insulator
Xinwei Li, Honglie Ning, Omar Mehio +7
The fate of a Mott insulator under strong low frequency optical driving conditions is a fundamental problem in quantum many-body dynamics. Using ultrafast broadband optical spectro…
Cooling of Isolated Neutron Stars with Pion Condensation: Possible Fast Cooling in a Low-Symmetry-Energy Model
Akira Dohi, Helei Liu, Tsuneo Noda +1
We studied thermal evolution of isolated neutron stars (NSs) including the pion condensation core, with an emphasis on the stiffness of equation of state (EOS). Many temperature ob…
High-order Harmonic Generation and its Unconventional Scaling Law in the Mott-insulating
K. Uchida, G. Mattoni, S. Yonezawa +3
Competition and cooperation among orders is at the heart of many-body physics in strongly correlated materials and leads to their rich physical properties. It is crucial to investi…
Effects of Nuclear Equation of State on Type-I X-ray Bursts: Interpretation of the X-ray Bursts from GS 1826-24
A. Dohi, N. Nishimura, M. Hashimoto +3
Type I X-ray bursts are thermonuclear explosions on the neutron star (NS) surface caused by mass accretion from a companion star. Observations of X-ray bursts provide valuable info…
Observation of inverse magnetocaloric effect in magnetic-field-induced austenite phase of Heusler Alloys Ni50-xCoxMn31.5Ga18.5 (x = 9 and 9.7)
T. Kihara, T. Roy, X. Xu +7
Magnetocaloric effect (MCE), magnetization, specific heat, and magnetostriction measurements were performed in both pulsed and steady high magnetic fields to investigate the magnet…
Quiescent luminosities of accreting neutron stars with different equation of states
Helei Liu, Akira Dohi, Masa-aki Hashimoto +3
We model the quiescent luminosity of accreting neutron stars with several equation of states (EOSs), including the effect of pion condensation and superfluidity. As a consequence o…
Emergence of low-energy electronic states in oxygen-controlled Mott insulator CaRuO
Takeo Miyashita, Hideaki Iwasawa, Tomoki Yoshikawa +7
Insulator-to-metal transition in CaRuO has drawn keen attention because of its sensitivity to various stimulation and its potential controllability. Here, we report a d…
Hybridization of Bogoliubov-quasiparticles between adjacent CuO layers in the triple-layer cuprate BiSrCaCuO studied by ARPES
S. Ideta, S. Johnston, T. Yoshida +13
Hybridization of Bogoliubov quasiparticles (BQPs) between the CuO layers in the triple-layer cuprate high-temperature superconductor BiSrCaCuO is studi…
Role of local temperature in the current-driven metal-insulator transition of Ca2RuO4
Giordano Mattoni, Shingo Yonezawa, Fumihiko Nakamura +1
It was recently reported that a continuous electric current is a powerful control parameter to trigger changes in the electronic structure and metal-insulator transitions (MITs) in…
Abnormal flip in coherent phonon oscillations of CaRuO
Min-Cheol Lee, Choong H. Kim, Inho Kwak +9
We employ an optical pump-probe technique to study coherent phonon oscillations in CaRuO. We find that oscillation-amplitude of an symmetric phonon mode is strongly s…
Isoperimetric deformations of curves on the Minkowski plane
Hyeongki Park, Jun-ichi Inoguchi, Kenji Kajiwara +3
We formulate an isoperimetric deformation of curves on the Minkowski plane, which is governed by the defocusing mKdV equation. Two classes of exact solutions to the defocusing mKdV…
Strong spin-phonon coupling unveiled by coherent phonon oscillations in Ca2RuO4
Min-Cheol Lee, Choong H. Kim, Inho Kwak +8
We utilize near-infrared femtosecond pulses to investigate coherent phonon oscillations of Ca2RuO4. The coherent Ag phonon mode of the lowest frequency changes abruptly not only it…
Big-Bang nucleosynthyesis: constraints on nuclear reaction rates, neutrino degeneracy, inhomogeneous and Brans-Dicke models
Riou Nakamura, Masa-aki Hasahimoto, Ryotaro Ichimasa +1
We review the recent progress in the Big-Bang nucleosynthesis which includes the standard and non-standard theory of cosmology, effects of neutrino degeneracy, and inhomogeneous nu…
Anomalous Thermoelectric Response in an Orbital-Ordered Oxide Near and Far from Equilibrium
Yasuo Nishina, Ryuji Okazaki, Yukio Yasui +2
We report the thermoelectric transport properties in the orbital-ordered Mott insulating phase of CaRuO close to and far from equilibrium. Near equilibrium conditions where…
Discrete Local Induction Equation
Sampei Hirose, Jun-ichi Inoguchi, Kenji Kajiwara +2
The local induction equation, or the binormal flow on space curves is a well-known model of deformation of space curves as it describes the dynamics of vortex filaments, and the co…
Quiescent Light Curve of Accreting Neutron Star MAXI J0556-332
Helei Liu, Yasuhide Matsuo, Masa-aki Hashimoto +2
MAXI J0556-332 is the hottest transient accreting neutron star at the beginning of its quiescence. A theoretical model with crustal heating indicates that an additional shallow hea…
Current-induced giant diamagnetism in the Mott insulator Ca2RuO4
Chanchal Sow, Shingo Yonezawa, Sota Kitamura +4
Mott insulators have surprised us many times by hosting new and diverse quantum phenomena when the frozen electrons are perturbed by various stimuli. Superconductivity, metal-insul…
Cooling of Compact Stars with Color Superconducting Quark Matter
Tsuneo Noda, Nobutoshi Yasutake, Masa-aki Hashimoto +3
We show a scenario for the cooling of compact stars considering the central source of Cassiopeia A (Cas A). The Cas A observation shows that the central source is a compact star wi…
Big-Bang Nucleosynthesis in comparison with observed helium and deuterium abundances - possibility of a non-standard model
R. Ichimasa, R. Nakamura, M. Hashimoto +1
Comparing the latest observed abundances of 4He and D, we make a ?2 analysis to see whether it is possible to reconcile primordial nucleosynthesis using up-to-date nuclear data of…
Anisotropic uniaxial pressure response of the Mott insulator Ca2RuO4
Haruka Taniguchi, Keigo Nishimura, Ryo Ishikawa +4
We have investigated the in-plane uniaxial pressure effect on the antiferromagnetic Mott insulator Ca2RuO4 from resistivity and magnetization measurements. We succeeded in inducing…