Dr Ryutaro Okuma: Publications

Uncovering hidden Fermi surface instabilities through visualizing unconventional quasiparticle interference in CeTe3

Physical Review Materials American Physical Society (APS) 8:10 (2024) 104004

Authors:

BRM Smith, Y Fujisawa, P Wu, T Nakamura, N Tomoda, S Kuniyoshi, D Ueta, R Kobayashi, R Okuma, K Arai, K Kuroda, C-H Hsu, G Chang, C-Y Huang, H Lin, ZY Wang, T Kondo, Y Okada

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Emergent topological magnetism in Hund's excitonic insulator

ArXiv 2405.16781 (2024)

Authors:

R Okuma, K Yamagami, Y Fujisawa, CH Hsu, Y Obata, N Tomoda, M Dronova, K Kuroda, H Ishikawa, K Kawaguchi, K Aido, K Kindo, YH Chan, H Lin, Y Ihara, T Kondo, Y Okada

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Compass-model physics on the hyperhoneycomb lattice in the extreme spin-orbit regime: Data archive

University of Oxford (2024)

Authors:

Ryutaro Okuma, Kylie MacFarquharson, Roger D Johnson, David Voneshen, Pascal Manuel, Radu Coldea

Abstract:

This dataset contains plain text files containing the data presented in the corresponding manuscript.

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Selective synthesis and crystal chemistry of candidate rare earth Kitaev materials honeycomb and hyperhoneycomb Na2PrO3: Data archive

University of Oxford (2024)

Authors:

Ryutaro Okuma, Kylie MacFarquharson, Radu Coldea

Abstract:

This dataset contains plain text files containing the data presented in Figures 1, 4, 6, 7 and 8 of the corresponding manuscript published in Inorganic Chemistry.

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Negative-chirality order in S = 1/2 kagome antiferromagnet CdCu3(OH)6(NO3)2·H2O

Physical Review B American Physical Society 106:2 (2022) 24401

Authors:

Yoshihiko Ihara, Ryoga Hiyoshi, Masakazu Shimohashi, Kaoru Hayashi, Ryutaro Okuma, Fabio Orlandi, Pascal Manuel, Gøran J Nilsen, Zenji Hiroi

Abstract:

Neutron diffraction and nuclear magnetic resonance (NMR) measurements have been used to analyze the magnetic structure in the S = 1 2 kagome antiferromagnet CdCu 3 ( OH ) 6 ( NO 3 ) 2 ⋅ H 2 O . Below the magnetic ordering temperature T N ≃ 4 K , magnetic Bragg reflections at (101) and (100) were found in the neutron diffraction pattern, which suggests a q = 0 magnetic structure. Furthermore, the vector spin chirality for the q = 0 structure was successfully identified from the internal field direction obtained by the 14 N -NMR measurement, previous magnetization measurements, and magnetic symmetry analysis. Our findings point to a chirality-ordered magnetic structure with negative vector chirality and ⟨ 100 ⟩ anisotropy.

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Dr Ryutaro Okuma

Research theme

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Synthesized pharmacosiderite

Uncovering hidden Fermi surface instabilities through visualizing unconventional quasiparticle interference in CeTe3

Authors:

Emergent topological magnetism in Hund's excitonic insulator

Authors:

Compass-model physics on the hyperhoneycomb lattice in the extreme spin-orbit regime: Data archive

Authors:

Abstract:

Selective synthesis and crystal chemistry of candidate rare earth Kitaev materials honeycomb and hyperhoneycomb Na2PrO3: Data archive

Authors:

Abstract:

Negative-chirality order in S = 1/2 kagome antiferromagnet CdCu3(OH)6(NO3)2·H2O

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Abstract:

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Dr Ryutaro Okuma

Research theme

Sub department

Research groups

Synthesized pharmacosiderite

Uncovering hidden Fermi surface instabilities through visualizing unconventional quasiparticle interference in CeTe3

Authors:

Emergent topological magnetism in Hund's excitonic insulator

Authors:

Compass-model physics on the hyperhoneycomb lattice in the extreme spin-orbit regime: Data archive

Authors:

Abstract:

Selective synthesis and crystal chemistry of candidate rare earth Kitaev materials honeycomb and hyperhoneycomb Na2PrO3: Data archive

Authors:

Abstract:

Negative-chirality order in S = 1/2 kagome antiferromagnet CdCu3(OH)6(NO3)2·H2O

Authors:

Abstract: