Zobrazeno 1 - 10
of 13 075
pro vyhledávání: '"Okuma, A."'
Autor:
Ikenobe, Toshiya, Yamada, Takahiro, Yamaura, Jun-ichi, Oguchi, Tamio, Okuma, Ryutaro, Hirai, Daigorou, Sagayama, Hajime, Okamoto, Yoshihiko, Hiroi, Zenji
Publikováno v:
Chemistry of Materials, 2024
Compounds with the anti-PbFCl structure exhibit a variety of electronic instabilities and intriguing physical properties. NaAlSi and NaAlGe are similar topological nodal-line semimetals, but they have distinct properties. NaAlSi is a superconductor a
Externí odkaz:
http://arxiv.org/abs/2412.17194
Autor:
Smith, B. R. M., Fujisawa, Y., Wu, P., Nakamura, T., Tomoda, N., Kuniyoshi, S., Ueta, D., Kobayashi, R., Okuma, R., Arai, K., Kuroda, K., Hsu, C-H., Chang, G., Huang, C-Y., Lin, H., Wang, Z-Y., Okada, Y.
Publikováno v:
Physical Review Materials 8, 104004 (2024)
The charge density wave (CDW) state is a widespread phenomenon in low-dimensional metals/semimetals. The spectral weight of the associated folded bands (shadow bands) can be an intriguing trigger leading to additional Fermi surface instability and un
Externí odkaz:
http://arxiv.org/abs/2411.06662
Let $A$ be an excellent two-dimensional normal local ring containing an algebraically closed field. Then $A$ is called an elliptic singularity if $p_f(A)=1$, where $p_f$ denotes the fundamental genus. On the other hand, the concept of almost Gorenste
Externí odkaz:
http://arxiv.org/abs/2410.23911
Autor:
Yuchi, Kosuke, Nishio-Hamane, Daisuke, Kojima, Keita, Moriyama, Kodai, Okuma, Ryutaro, Okamoto, Yoshihiko
Publikováno v:
J. Phys. Soc. Jpn. 94, 013701(1-5) (2025)
We report the synthesis and electronic properties of polycrystalline samples of Zr6MBi2 (M = Ru and Fe) crystallizing in the hexagonal Zr6CoAl2-type structure. Based on their electrical resistivity, magnetization, and heat capacity data, Zr6RuBi2 and
Externí odkaz:
http://arxiv.org/abs/2410.16684
Rare earth oxides have attracted interest as a platform for studying frustrated magnetism arising from bond dependent anisotropic interactions. Ordered rock salt compounds Na$_2$PrO$_3$ crystallize in two polymorphs ($\alpha$ and $\beta$) comprising
Externí odkaz:
http://arxiv.org/abs/2410.09171
Autor:
Okuma, Ryutaro, MacFarquharson, Kylie, Johnson, Roger D., Voneshen, David, Manuel, Pascal, Coldea, Radu
The physics of spin-orbit entangled magnetic moments of $4d$ and $5d$ transition metal ions on a honeycomb lattice has been much explored in search for unconventional magnetic orders or quantum spin liquids expected for compass spin models, where dif
Externí odkaz:
http://arxiv.org/abs/2410.09167
Autor:
Nakajima, R., Arai, S., Aoyama, K., Utsumi, Y., Tamba, T., Odaka, H., Tanaka, M., Yorita, K., Aramaki, T., Asaadi, J., Bamba, A., Cannady, N., Coppi, P., De Nolfo, G., Errando, M., Fabris, L., Fujiwara, T., Fukazawa, Y., Ghosh, P., Hagino, K., Hakamata, T., Hijikata, U., Hiroshima, N., Ichihashi, M., Ichinohe, Y., Inoue, Y., Ishikawa, K., Ishiwata, K., Iwata, T., Karagiorgi, G., Kato, T., Kawamura, H., Krizmanic, J., Leyva, J., Malige, A., Mitchell, J. G., Mitchell, J. W., Mukherjee, R., Nakazawa, K., Okuma, K., Perez, K., Poudyal, N., Safa, I., Sasaki, M., Seligman, W., Shirahama, K., Shiraishi, T., Smith, S., Suda, Y., Suraj, A., Takahashi, H., Takashima, S., Tandon, S., Tatsumi, R., Tomsick, J., Tsuji, N., Uchida, Y., Watanabe, S., Yano, Y., Yawata, K., Yoneda, H., Yoshimoto, M., Zeng, J.
Publikováno v:
Progress of Theoretical and Experimental Physics, Volume 2024, Issue 12, December 2024, 123F01
GRAMS (Gamma-Ray and AntiMatter Survey) is a next-generation balloon/satellite experiment utilizing a LArTPC (Liquid Argon Time Projection Chamber), to simultaneously target astrophysical observations of cosmic MeV gamma-rays and conduct an indirect
Externí odkaz:
http://arxiv.org/abs/2409.13209
Autor:
Mizoguchi, Tomonari, Okuma, Nobuyuki
Publikováno v:
J. Phys. Soc. Jpn. 93, 095002 (2024)
We prove that two formulas of the orbital magnetic susceptibility, namely, Koshino-Ando's formula and G\'{o}mez-Santos and Stauber's formula, are equivalent for the tight-binding models. The difference between these two formulas can be written in a f
Externí odkaz:
http://arxiv.org/abs/2405.19993
Autor:
Okuma, R., Yamagami, K., Fujisawa, Y., Hsu, C. H., Obata, Y., Tomoda, N., Dronova, M., Kuroda, K., Ishikawa, H., Kawaguchi, K., Aido, K., Kindo, K., Chan, Y. H., Lin, H., Ihara, Y., Kondo, T., Okada, Y.
Analogous to the charged electron-electron pair condensation in superconductors, an excitonic insulator (EI) represents Fermi surface instability due to spontaneous formation and condensation of charge-neutral electron-hole pair (exciton). Unlike in
Externí odkaz:
http://arxiv.org/abs/2405.16781
Autor:
Okuma, Nobuyuki
In the field of fractional Chern insulators, a great deal of effort has been devoted to characterizing Chern bands that exhibit properties similar to the Landau levels. Among them, the concept of the vortex function, which generalizes the complex coo
Externí odkaz:
http://arxiv.org/abs/2405.11796