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Journal Articles

Intrinsic spin Nernst effect in topological Dirac and magnetic Weyl semimetals

Matsushita, Taiki*; Ozawa, Akihiro*; Araki, Yasufumi; Fujimoto, Junji*; Sato, Masatoshi*

Physical Review B, 111(24), p.245131_1 - 245131_11, 2025/06

Journal Articles

Neutron diffraction study of the crystal and magnetic structures of antiferromagnetic manganese deuteride at high temperatures and high pressures

Machida, Akihiko*; Saito, Hiroyuki*; Aoki, Katsutoshi*; Komatsu, Kazuki*; Hattori, Takanori; Sano, Asami; Funakoshi, Kenichi*; Machida, Shinichi*; Sato, Toyoto*; Orimo, Shinichi*

Physical Review B, 111(22), p.224413_1 - 224413_6, 2025/06

The crystal and magnetic structures of antiferromagnetic Mn deuterides formed by hydrogenating Mn metal at high temperature and high pressure, fcc $$gamma$$-MnDx and hcp $$epsilon$$-MnDx, were investigated by in-situ neutron powder diffraction. Deuterium atoms partially occupied the octahedral interstitial positions of the fcc and hcp metal lattices. The site occupancies increased rapidly with decreasing temperature from $$sim$$700 to $$sim$$450 K and remained down to 300 K. N$'{e}$el temperature of 543(10) K was determined for $$gamma$$-MnD$$_{0.34}$$. For $$epsilon$$-MnD$$_{0.62}$$, saturation magnetic moment and N$'{e}$el temperature were determined to be 0.82(1) $$mu_B$$ and 347(3) K, respectively. The N$'{e}$el temperatures determined for $$gamma$$-MnD$$_{0.34}$$ and $$epsilon$$-MnD$$_{0.62}$$ are consistent with those predicted by the respective Slater-Pauling curves proposed in previous studies. The updated N$'{e}$el temperatures provide insights into the development of more accurate Slater-Pauling curves based on electronic band structure calculations.

Journal Articles

Magnetism of kagome metals (Fe$$_{1-x}$$Co$$_x$$)Sn studied by $$mu$$SR

Cai, Y.*; Yoon, S.*; Sheng, Q.*; Zhao, G.*; Seewald, E. F.*; Ghosh, S.*; Ingham, J.*; Pasupathy, A. N.*; Queiroz, R.*; Lei, H.*; et al.

Physical Review B, 111(21), p.214412_1 - 214412_17, 2025/06

Journal Articles

Electrically controlled nonlinear magnon-magnon coupling in a synthetic antiferromagnet

Sud, A.*; Yamamoto, Kei; Iihama, Satoshi*; Ishibashi, Kazuaki*; Fukami, Shunsuke*; Kurebayashi, Hidekazu*; Mizukami, Shigemi*

Physical Review Letters, 134(24), p.246704_1 - 246704_7, 2025/06

Journal Articles

Topological spin-orbit torque in ferrimagnetic Weyl semimetal

Meguro, Tomonari*; Ozawa, Akihiro*; Kobayashi, Koji*; Araki, Yasufumi; Nomura, Kentaro*

Physical Review Research (Internet), 7(2), p.L022065_1 - L022065_8, 2025/06

Journal Articles

Scalar spin chirality Nernst effect

Go, G.*; Goli, D. P.*; Esaki, Nanse; Tserkovnyak, Y.*; Kim, S. K.*

Physical Review Research (Internet), 7(2), p.L022066_1 - L022066_7, 2025/06

Journal Articles

Crystal structures and phase stability of antiferroelectric $$R$$ phases in undoped and Ca-modified sodium niobates

Aso, Seiyu*; Matsuo, Hiroki*; Yoneda, Yasuhiro; Morikawa, Daisuke*; Tsuda, Kenji*; Oyama, Kenji*; Ishigaki, Toru*; Noguchi, Yuji*

Physical Review B, 111(17), p.174114_1 - 174114_12, 2025/05

We investigate the crystal structures, phase transitions, and phase stability of undoped and Ca-modified NaNbO$$_{3}$$ through a combined analysis of high-resolution synchrotron radiation X-ray and neutron diffraction, convergent-beam electron diffraction, and density functional theory (DFT) calculations. It is demonstrated that the antiferroelectric (AFE)-$$R$$ phase is stabilized over a wide temperature range of 200 to 800 K by Ca modification, and that the NaNbO$$_3$$ is stabilized by temperature-driven isostatic pressure accompanied by lattice expansion, whereas the Ca-modified NaNbO$$_3$$ is induced by composition-induced chemical pressure along with lattice shrinkage.

Journal Articles

Incommensurate antiferromagnetism in UTe$$_2$$ under pressure

Knafo, W.*; Thebault, T.*; Raymond, S.*; Manuel, P.*; Khalyavin, D. D.*; Orlandi, F.*; Ressouche, E.*; Beauvois, K.*; Lapertot, G.*; Kaneko, Koji; et al.

Physical Review X, 15(2), p.021075_1 - 021075_16, 2025/05

Journal Articles

Magnetoferroelectric phase transition induced by latent spin-lattice coupling in the geometrically frustrated magnet $$mathrm{CuFe_{0.95}Al_{0.05}O_{2}}$$

Tamatsukuri, Hiromu; Uchihara, Takeru*; Mitsuda, Setsuo*; Ishii, Yuta*; Nakao, Hironori*; Takehana, Kanji*; Imanaka, Yasutaka*

Physical Review B, 111(13), p.134403_1 - 134403_9, 2025/04

 Times Cited Count:0 Percentile:0.00(Materials Science, Multidisciplinary)

Journal Articles

Crystal structures of ReO$$_3$$ under hydrostatic pressure; A Combined neutron, X-ray, Raman, and first-principles calculation study

Efthimiopoulos, I.*; Klotz, S.*; Kunc, K.*; Baptiste, B.*; Chauvigne, P.*; Hattori, Takanori

Physical Review B, 111(13), p.134103_1 - 134103_13, 2025/04

 Times Cited Count:0 Percentile:0.00(Materials Science, Multidisciplinary)

We present a comprehensive study of the high pressure behaviour of ReO$$_3$$ using X-ray and neutron diffraction, Raman scattering and first-principles calculations to 15 GPa. We show that the ambient pressure $$Pm$$$=3$m$$ structure converts at 0.7 GPa in a continuous phase transition directly to a cubic phase with space group $$Im$$$=3 which is then stable up to at least 15 GPa. We show that previous reports of monoclinic $C2/c$$ and rhombohedral $$R$$$=3$c$$ structures in this pressure range are an artifact due to an alteration of the sample by high-flux synchrotron X-ray radiation. The structural pressure dependence of the $$Im$$$=3 phase is reported as well as the precise equation of state. Raman scattering data of both natural and isotopically enriched $^{18}$$O samples are presented. The data shed light onto the unusual transition and densification mechanism due to progressive tilting of essentially rigid ReO$$_6$$ octahedra.

Journal Articles

Competition between mass-symmetric and asymmetric fission modes in $$^{258}$$Md produced in the $$^{4}$$He + $$^{254}$$Es reaction

Nishio, Katsuhisa; Hirose, Kentaro; Makii, Hiroyuki; Orlandi, R.; Kean, K. R.*; Tsukada, Kazuaki; Toyoshima, Atsushi*; Asai, Masato; Sato, Tetsuya; Chiera, N. M.*; et al.

Physical Review C, 111(4), p.044609_1 - 044609_12, 2025/04

 Times Cited Count:0

Journal Articles

Mechanical multiplexer of nuclear spin states

Chudo, Hiroyuki; Yokoi, Naoto*; Matsuo, Mamoru; Harii, Kazuya*; Suzuki, Jun*; Imai, Masaki; Sato, Masahiro*; Maekawa, Sadamichi*; Saito, Eiji*

Physical Review Letters, 134(13), p.130603_1 - 130603_5, 2025/04

 Times Cited Count:0 Percentile:0.00(Physics, Multidisciplinary)

Journal Articles

Spin-singlet ground state with spin gap in $$S_{rm eff}$$ = $$frac{1}{2}$$ antiferromagnetic tetramer compound Yb$$_2$$SiO$$_5$$

Hase, Masashi*; Kaneko, Koji; Tabata, Chihiro; Yamauchi, Hiroki; Tsujii, Naohito*; D$"o$nni, A.*

Physical Review B, 111(9), p.094403_1 - 094403_9, 2025/03

 Times Cited Count:0 Percentile:0.00(Materials Science, Multidisciplinary)

Journal Articles

Intrinsic low-temperature magnetic properties on ultraclean UTe$$_2$$ with $$T_c$$ = 2.1 K revealed by $$^{125}$$Te NMR

Matsumura, Hiroki*; Tokunaga, Yo; Sakai, Hironori; Kambe, Shinsaku; 13 of others*

Physical Review B, 111(9), p.094507_1 - 094507_9, 2025/03

 Times Cited Count:0 Percentile:0.00(Materials Science, Multidisciplinary)

Journal Articles

Magnetic and quadrupole coupling emerging in NdB$$_4$$ with geometrically frustrated orthogonal antiferromagnetic dimer

Metoki, Naoto; Yamauchi, Hiroki; Hagihara, Masato; Watanuki, Ryuta*; Kawamura, Seiko; Kofu, Maiko*; Nakajima, Kenji; Matsuda, Masaaki*

Physical Review B, 111(10), p.104424_1 - 104424_9, 2025/03

 Times Cited Count:0 Percentile:0.00(Materials Science, Multidisciplinary)

Inelastic neutron scattering experiments were carried out to understand the unusual successive order in NdB$$_4$$ with the frustrated Shatry-Sutherland (SS) lattice. The pseudo-quartet with $$|pm frac{5}{2}rangle$$ and $$|pm frac{7}{2}rangle$$ splits into four levels in the magnetically ordered states. The spectra can be explained with the on-site magnetic interaction $$langle J_x rangle J_x$$, the coupling of $$J_x$$ with quadrupole $$O_{zx}$$, and the uniaxial crystalline electric field. The $$f$$-electron states reproduce the temperature dependences of the in-plane moment $$m_perp=langle J_x rangle$$ which is the primary order parameter, and a weakly induced $$m_c=langle J_z rangle$$ as the secondary order parameter. The magnetic-quadrupole coupling emerges and play essential role under the geometrical frustration, where the Heisenberg interactions are cancelled out.

Journal Articles

Nonreciprocal resonant surface acoustic wave absorption in Y$$_{3}$$Fe$$_{5}$$O$$_{12}$$

Ba, Y.*; Yamamoto, Kei; 6 of others*

Physical Review B, 111(10), p.104401_1 - 104401_15, 2025/03

 Times Cited Count:0 Percentile:0.00(Materials Science, Multidisciplinary)

Journal Articles

Spontaneous magnetic field and disorder effects in BaPtAs$$_{1-x}$$Sb$$_x$$ with a honeycomb network

Adachi, Tadashi*; Ogawa, Taiki*; Komiyama, Yota*; Sumura, Takuya*; Saito-Tsuboi, Yuki*; Takeuchi, Takaaki*; Mano, Kohei*; Manabe, Kaoru*; Kawabata, Koki*; Imazu, Tsuyoshi*; et al.

Physical Review B, 111(10), p.L100508_1 - L100508_6, 2025/03

 Times Cited Count:0 Percentile:0.00(Materials Science, Multidisciplinary)

Journal Articles

Comprehensive Bayesian machine learning approach to estimating the total nuclear capture rate of a negative muon

Iwamoto, Hiroki; Niikura, Megumi*; Mizuno, Rurie*

Physical Review C, 111(3), p.034614_1 - 034614_13, 2025/03

 Times Cited Count:0 Percentile:0.00(Physics, Nuclear)

A negative muon in the 1$$s$$ orbital can be captured by a nucleus, leading to subsequent nuclear dacay processes. The accurate prediction of total nuclear capture rates, which could be crucial in fields such as geochemistry, nuclear astrophysics, and semiconductor device developement, remains challenging with curren physics models. This study aims to develop a comprehensive machine learning (ML) model to estimate the total nuclear capture rate of a negative muon, integrating physical information and experimental data within a Bayesian framework. The study employs an ML model based on Gaussian process regression, using experimental data with evaluated uncertainties as training data. The model incoporates the Goulard-Primakoff formula as prior information and applies a transfer learning approach to improve estimations, particularly in data-sparse regions. The developed ML model is shown to outperform theoretical physics models in both accuracy and comprehensiveness, with key experiments identified to further refine the model performance. The estimates generated in this study will be incorporated into muon nuclear data applied accross a variety of research fields.

Journal Articles

Production and in-medium modification of $$phi$$ mesons in proton-nucleus reactions from a transport approach

Gubler, P.; Ichikawa, Masaya; Song, T.*; Bratkovskaya, E.*

Physical Review C, 111(3), p.034908_1 - 034908_12, 2025/03

 Times Cited Count:1 Percentile:0.00(Physics, Nuclear)

Journal Articles

Transverse asymmetry of individual $$gamma$$ rays in the $$^{139}$$La($$overrightarrow{n},gamma$$)$$^{140}$$La reaction

Okuizumi, Mao*; Auton, C. J.*; Endo, Shunsuke; Fujioka, Hiroyuki*; Hirota, Katsuya*; Ino, Takashi*; Ishizaki, Kohei*; Kimura, Atsushi; Kitaguchi, Masaaki*; Koga, Jun*; et al.

Physical Review C, 111(3), p.034611_1 - 034611_6, 2025/03

 Times Cited Count:0 Percentile:0.00(Physics, Nuclear)

2303 (Records 1-20 displayed on this page)