Search Results - "Koda, Akihiro"
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Gapless spin liquid in a square-kagome lattice antiferromagnet
Published in Nature communications (09-07-2020)“…Observation of a quantum spin liquid (QSL) state is one of the most important goals in condensed-matter physics, as well as the development of new spintronic…”
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Dimensional reduction by geometrical frustration in a cubic antiferromagnet composed of tetrahedral clusters
Published in Nature communications (19-07-2021)“…Dimensionality is a critical factor in determining the properties of solids and is an apparent built-in character of the crystal structure. However, it can be…”
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Extreme Suppression of Antiferromagnetic Order and Critical Scaling in a Two-Dimensional Random Quantum Magnet
Published in Physical review letters (22-01-2021)“…Sr_{2}CuTeO_{6} is a square-lattice Néel antiferromagnet with superexchange between first-neighbor S=1/2 Cu spins mediated by plaquette centered Te ions…”
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Negative Muon Spin Rotation and Relaxation Study on Battery Anode Material, Spinel Li4Ti5O12
Published in Journal of physical chemistry. C (30-06-2022)“…To study an intrinsic self-diffusion coefficient of Li+ (D Li J) in a battery anode material, spinel Li4Ti5O12, negative and positive muon spin rotation and…”
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Organic molecular dynamics and charge-carrier lifetime in lead iodide perovskite MAPbI3
Published in Proceedings of the National Academy of Sciences - PNAS (25-01-2022)“…The long charge carrier lifetime of the hybrid organic–inorganic perovskites (HOIPs) is the key for their remarkable performance as a solar cell material. The…”
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Quantum magnetisms in uniform triangular lattices Li2AMo3O8 (A = In, Sc)
Published in Scientific reports (12-02-2019)“…Molecular based spin-1/2 triangular lattice systems such as LiZn 2 Mo 3 O 8 have attracted research interest. Distortions, defects, and intersite disorder are…”
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μSR Study of Kapellasite-type Quantum Kagome Antiferromagnet CaCu3(OH)6Cl2 ∙ 0.6H2O
Published in Journal of the Physical Society of Japan (15-01-2022)“…To elucidate the dynamical properties of quantum kagome antiferromagnet CaCu3(OH)6Cl2 ∙ 0.6H2O, we performed muon spin rotation and relaxation (μSR)…”
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Na Diffusion in Hard Carbon Studied with Positive Muon Spin Rotation and Relaxation
Published in ACS Physical Chemistry Au (23-03-2022)“…The diffusive nature of Na+ in Na-inserted hard carbon (C x Na), which is the most common anode material for a Na-ion battery, was studied with a positive muon…”
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Possible Tomonaga-Luttinger spin liquid state in the spin-1/2 inequilateral diamond-chain compound K3Cu3AlO2(SO4)4
Published in Scientific reports (01-12-2017)“…K 3 Cu 3 AlO 2 (SO 4 ) 4 is a highly one-dimensional spin-1/2 inequilateral diamond-chain antiferromagnet. Spinon continuum and spin-singlet dimer excitations…”
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New beamlines and future prospects of the J-PARC muon facility
Published in EPJ Web of conferences (2023)“…At the J-PARC muon facility (MUSE), new beamlines started operation recently. H-line is a high-intensity pulsed muon beamline for fundamental physics…”
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Observation of Cu Spin Fluctuations in High-Tc Cuprate Superconductor Nanoparticles Investigated by Muon Spin Relaxation
Published in Nanomaterials (Basel, Switzerland) (20-12-2021)“…The nano-size effects of high-Tc cuprate superconductor La2−xSrxCuO4 with x = 0.20 are investigated using X-ray diffractometry, Transmission electron…”
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Competition between magnetic interactions and structural instabilities leading to itinerant frustration in the triangular lattice antiferromagnet LiCrSe2
Published in Communications materials (07-10-2023)“…LiCrSe 2 constitutes a recent valuable addition to the ensemble of two-dimensional triangular lattice antiferromagnets. In this work, we present a…”
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Materials and Life Science Experimental Facility at the Japan Proton Accelerator Research Complex IV: The Muon Facility
Published in Quantum beam science (01-06-2017)“…A muon experimental facility, known as the Muon Science Establishment (MUSE), is one of the user facilities at the Japan Proton Accelerator Research Complex,…”
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Muonium in Stishovite: Implications for the Possible Existence of Neutral Atomic Hydrogen in the Earth's Deep Mantle
Published in Scientific reports (13-02-2015)“…Hydrogen in the Earth's deep interior has been thought to exist as a hydroxyl group in high-pressure minerals. We present Muon Spin Rotation experiments on SiO…”
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Full Gap Superconductivity in Ba0.6K0.4Fe2As2 Probed by Muon Spin Rotation
Published in Journal of the Physical Society of Japan (01-02-2009)“…Superfluid density (ns) in the mixed state of an iron pnictide superconductor Ba1-xKxFe2As2 is determined by muon spin rotation for a sample with optimal…”
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Coexistence of Supercondcutivity and Magnetism in LaFeAs(O0.94F0.06) Probed by Muon Spin Relaxation
Published in Journal of the Physical Society of Japan (01-10-2008)“…The presence of macroscopic phase separation into superconducting and spin-glass-like magnetic phases in LaFeAs(O1-xFx) is demonstrated by muon spin rotation…”
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Possible anisotropic order parameter in pyrochlore superconductor KOs2O6 probed by muon spin rotation
Published in Journal of the Physical Society of Japan (01-06-2005)“…Magnetic penetration depth (λeff) in a pyrochlore superconductor KOs2O6 was studied by means of muon spin rotation (μSR). The temperature dependence of the…”
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Anomalous magnetic phase in an undistorted pyrochlore oxide Cd2Os2O7 induced by geometrical frustration
Published in Journal of the Physical Society of Japan (01-06-2007)“…We report on the muon spin rotation/relaxation study of a pyrochlore oxide, Cd2Os2O7, which exhibits a metal-insulator (MI) transition at TMI\\simeq225 K…”
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Birth of an intense pulsed muon source, J-PARC MUSE
Published in Physica. B, Condensed matter (15-04-2009)“…The muon science facility (MUSE), along with neutron, hadron, and neutrino facilities, is one of the experimental areas of the J-PARC (Japan Proton Accelerator…”
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