230 citations · 1.1k across the 23 of their papers we have counts for
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Excitonic Correlations, Spin-State Ordering, and Magnetic-Field Effects in One-Dimensional Two-Orbital Hubbard Model for Spin-Crossover Region
Koya Kitagawa, Hiroaki Matsueda
The electronic properties of excitonic insulators have been examined precisely in recent years. Pictures of exciton condensation may be applied to the spin-state transition observe…
Nearly room temperature ferromagnetism in pressure-induced correlated metallic state of van der Waals insulator CrGeTe
Dilip Bhoi, Jun Gouchi, Naoka Hiraoka +7
A complex interplay of different energy scales involving Coulomb repulsion, spin-orbit coupling and Hund's coupling energy in two-dimensional (2D) van der Waals (vdW) material prod…
Design of opposed-anvil-type high-pressure cell for precision magnetometry and its application to quantum magnetism
Naoka Hiraoka, Kelton Whiteaker, Marian Blankenhorn +4
We have developed a much sensitve technique to conduct magnetometry under ultrahigh pressures up to 6.3~GPa, which can detect a weak volume susceptibilities as small as $\sim 10^{-…
Quantum Paraelectricity in the Kitaev Quantum-Spin-Liquid Candidates HLiIrO and DLiIrO
K. Geirhos, P. Lunkenheimer, M. Blankenhorn +7
H3LiIr2O6 is the first honeycomb-lattice system without any signs of long-range magnetic order down to the lowest temperatures, raising the hope for the realization of an ideal Kit…
T/B scaling without quasiparticle mass divergence: YbCo2Ge4
A. Sakai, K. Kitagawa, K. Matsubayashi +2
YbCoGe is a clean paramagnetic Kondo lattice which displays non-Fermi liquid behavior. We report a detailed investigation of the specific heat, magnetic Grüneisen parameter…
Quantum Criticality Based on Large Ising Spins: YbCoGe with New 1-2-4 Structure Type
K. Kitagawa, Y. Kishimoto, M. Iwatani +8
We present a new type of quantum critical material YbCoGe, having the largest quantum-critical pseudospin size ever. The YbCoGe-type structure is new, forms in the…
Crossover from commensurate to incommensurate antiferromagnetism in stoichiometric NaFeAs revealed by single-crystal 23Na,75As-NMR experiments
Kentaro Kitagawa, Yuji Mezaki, Kazuyuki Matsubayashi +2
We report results of 23Na and 75As nuclear magnetic resonance (NMR) experiments on a self-flux grown high-quality single crystal of stoichiometric NaFeAs. The NMR spectra revealed…
Antiferromagnetism of SrFe2As2 studied by Single-Crystal 75As-NMR
Kentaro Kitagawa, Naoyuki Katayama, Kenya Ohgushi +1
We report results of 75As nuclear magnetic resonance (NMR) experiments on a self-flux grown high-quality single crystal of SrFe2As2. The NMR spectra clearly show sharp first-order…
High-temperature spin relaxation process in DyTiO probed by Ti-NQR
K. Kitagawa, R. Higashinaka, K. Ishida +2
We have performed nuclear quadrupole resonance (NQR) experiments on Ti nuclei in DyTiO in the temperature range 70 -- 300 K in order to investigate the dynamics…
Spin dynamics and spin freezing behavior in the two-dimensional antiferromagnet NiGaS revealed by Ga-NMR, NQR and SR measurements
H. Takeya, K. Ishida, K. Kitagawa +8
We have performed Ga nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) and muon spin rotation/resonance on the quasi two-dimensional antiferromagnet…
Orbital Properties of Sr3Ru2O7 and Related Ruthenates Probed by 17O-NMR
K. Kitagawa, K. Ishida, R. S. Perry +3
We report a site-separated O-NMR study of the layered perovskite ruthenate SrRuO, which exhibits nearly two-dimensional transport properties and itinerant metama…
Metamagnetic Quantum Criticality Revealed by 17O-NMR in the Itinerant Metamagnet Sr3Ru2O7
Kentaro Kitagawa, Kenji Ishida, Robin S. Perry +3
We have investigated the spin dynamics in the bilayered perovskite Sr3Ru2O7 as a function of magnetic field and temperature using 17O-NMR. This system sits close to a metamagnetic…
Investigation into the Itinerant metamagnetism of Sr3Ru2O7 for the Field Parallel to the Ruthenium Oxygen Planes
Robin S. Perry, Takashi Tayama, Kentaro Kitagawa +3
We report a detailed investigation into the metamagnetism of Sr3Ru2O7 at low temperatures for the magnetic field parallel to the ruthenium oxygen planes. The metamagnetism is studi…
The de Haas-van Alphen effect across the metamagnetic transition in SrRuO
R. A. Borzi, S. A. Grigera, R. S. Perry +4
We report a study of the de Haas-van Alphen (dHvA) effect on the itinerant metamagnet SrRuO. Extremely high sample purity allows the observation of dHvA oscillations bo…
Multiple first-order metamagnetic transitions and quantum oscillations in ultrapure
R. S. Perry, K. Kitagawa, S. A. Grigera +4
We present measurements on ultra clean single crystals of the bilayered ruthenate metal Sr3Ru2O7, which has a magnetic-field-tuned quantum critical point. Quantum oscillations of d…