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Journal Articles

Enhanced Spin-Orbit Coupling in a Correlated Metal

Kubo, Katsunori

Journal of the Physical Society of Japan, 91(12), p.124707_1 - 124707_7, 2022/12

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

Journal Articles

Magnetic diffuse and quasi-elastic scatterings in frustrated magnet YBaCo$$_{4}$$O$$_{7}$$

Soda, Minoru*; Kofu, Maiko; Kawamura, Seiko; Asai, Shinichiro*; Masuda, Takatsugu*; Yoshizawa, Hideki*; Furukawa, Hazuki*

Journal of the Physical Society of Japan, 91(9), p.094707_1 - 094707_5, 2022/09

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

Journal Articles

Magnetic orderings from spin-orbit coupled electrons on kagome lattice

Watanabe, Jin*; Araki, Yasufumi; Kobayashi, Koji*; Ozawa, Akihiro*; Nomura, Kentaro*

Journal of the Physical Society of Japan, 91(8), p.083702_1 - 083702_5, 2022/08

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

We investigate magnetic orderings on kagome lattice numerically from the tight-binding Hamiltonian of electrons, governed by the filling factor and spin-orbit coupling (SOC) of electrons. We find that even a simple kagome lattice model can host both ferromagnetic and noncollinear antiferromagnetic orderings depending on the electron filling, reflecting gap structures in the Dirac and flat bands characteristic to the kagome lattice. Kane-Mele- or Rashba-type SOC tends to stabilize noncollinear orderings, such a magnetic spirals and 120-degree antiferromagnetic orderings, due to the effective Dzyaloshinskii-Moriya interaction from SOC. The obtained phase structure helps qualitative understanding of magnetic orderings in various kagome-layered materials with Weyl or Dirac electrons.

Journal Articles

First observation of the de Haas-van Alphen effect and Fermi surfaces in the unconventional superconductor UTe$$_2$$

Aoki, Dai*; Sakai, Hironori; Opletal, P.; Tokiwa, Yoshifumi; Ishizuka, Jun*; Yanase, Yoichi*; Harima, Hisatomo*; Nakamura, Ai*; Li, D.*; Homma, Yoshiya*; et al.

Journal of the Physical Society of Japan, 91(8), p.083704_1 - 083704_5, 2022/08

 Times Cited Count:2 Percentile:84.89(Physics, Multidisciplinary)

Journal Articles

Cycloidal magnetic ordering in noncentrosymmetric EuIrGe$$_3$$

Matsumura, Takeshi*; Tsukakoshi, Mitsuru*; Ueda, Yoshihisa*; Higa, Nonoka*; Nakao, Akiko*; Kaneko, Koji; Kakihana, Masashi*; Hedo, Masato*; Nakama, Takao*; Onuki, Yoshichika*

Journal of the Physical Society of Japan, 91(7), p.073703_1 - 073703_5, 2022/07

 Times Cited Count:1 Percentile:68.58(Physics, Multidisciplinary)

Journal Articles

Various ordered states in Heisenberg FCC antiferromagnets with dipole-dipole interactions

Yokota, Terufumi

Journal of the Physical Society of Japan, 91(6), p.064003_1 - 064003_7, 2022/06

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

Journal Articles

Single crystal growth and magnetic properties of $$alpha$$-Mn and $$beta$$-Mn

Onuki, Yoshichika*; Aoki, Dai*; Nakamura, Ai*; Matsuda, Tatsuma*; Nakashima, Miho*; Haga, Yoshinori; Takeuchi, Tetsuya*

Journal of the Physical Society of Japan, 91(6), p.065001_1 - 065001_2, 2022/06

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

Journal Articles

Single crystal growth and magnetic properties of noncentrosymmetric antiferromagnet Mn$$_3$$IrSi

Onuki, Yoshichika*; Kaneko, Yoshio*; Aoki, Dai*; Nakamura, Ai*; Matsuda, Tatsuma*; Nakashima, Miho*; Haga, Yoshinori; Takeuchi, Tetsuya*

Journal of the Physical Society of Japan, 91(6), p.065002_1 - 065002_2, 2022/06

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

Journal Articles

Split Fermi surface properties of noncentrosymmetric compounds Fe$$_2$$P, Ni$$_2$$P, and Pd$$_2$$Si

Onuki, Yoshichika*; Nakamura, Ai*; Aoki, Dai*; Matsuda, Tatsuma*; Haga, Yoshinori; Harima, Hisatomo*; Takeuchi, Tetsuya*; Kaneko, Yoshio*

Journal of the Physical Society of Japan, 91(6), p.064712_1 - 064712_10, 2022/06

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

Journal Articles

Hyperfine splitting and nuclear spin polarization in NdPd$$_5$$Al$$_2$$ and Nd$$_3$$Pd$$_{20}$$Ge$$_6$$

Metoki, Naoto; Shibata, Kaoru; Matsuura, Masato*; Kitazawa, Hideaki*; Suzuki, Hiroyuki*; Yamauchi, Hiroki; Hagihara, Masato; Frontzek, M. D.*; Matsuda, Masaaki*

Journal of the Physical Society of Japan, 91(5), p.054710_1 - 054710_6, 2022/05

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

Hyperfine splitting of Nd nuclei in NdPd$$_5$$Al$$_2$$ has been studied by means of high-resolution neutron spectroscopy. We observed inelastic peaks at $$hbaromega =pm3;{mu}$$eV coming from the hyperfine splitting in the magnetically ordered phase due to the hyperfine interactions between Nd nuclei ($$I$$=7/2) and the 4$$f$$ electrons with $$Gamma_6$$ ground state composed of mainly $$|pm9/2rangle$$. At very low temperatures, nuclear spin of Nd is polarized with increasing occupation probability of low energy levels and contributes to the enhancement of the antiferromagnetic Bragg intensities: the elastic non-spin-flip channel is dominant. As an application of this phenomenon, we determined the Nd moment and hyperfine splitting from the temperature dependence of an antiferromagnetic Bragg intensities for Nd$$_3$$Pd$$_{20}$$Ge$$_6$$.

Journal Articles

Magnetism of Al$$_{x}$$Fe$$_{2-x}$$GeO$$_{5}$$ with andalusite structure

Kakimoto, Kazuo*; Takada, Saki*; Ota, Hiroto*; Hayaguchi, Yuya*; Hagihara, Masato; Torii, Shuki*; Kamiyama, Takashi*; Mitamura, Hiroyuki*; Tokunaga, Masashi*; Hatakeyama, Atsushi*; et al.

Journal of the Physical Society of Japan, 91(5), p.054704_1 - 054704_7, 2022/05

 Times Cited Count:1 Percentile:68.58(Physics, Multidisciplinary)

Journal Articles

Fourier interpolation method in phase space of Hamiltonian systems

Sasa, Narimasa

Journal of the Physical Society of Japan, 91(5), p.054001_1 - 054001_8, 2022/05

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

Journal Articles

Sinusoidal magnetic structure of andalusite-type AlxFe$$_{2}$$-xGeO$$_{5}$$ with $$x$$ = 0.09 and 0.15

Kakimoto, Kazuo*; Ota, Hiroto*; Haraguchi, Yuya*; Hagihara, Masato; Torii, Shuki*; Kamiyama, Takashi*; Katori, Hiroko*

Journal of the Physical Society of Japan, 91(5), p.054707_1 - 054707_9, 2022/05

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

Journal Articles

Estimated isotopic compositions of Yb in enriched $$^{176}$$Yb for producing $$^{177}$$Lu with high radionuclide purity by $$^{176}$$Yb($$d,x$$)$$^{177}$$Lu

Nagai, Yasuki*; Kawabata, Masako*; Hashimoto, Shintaro; Tsukada, Kazuaki; Hashimoto, Kazuyuki*; Motoishi, Shoji*; Saeki, Hideya*; Motomura, Arata*; Minato, Futoshi; Ito, Masatoshi*

Journal of the Physical Society of Japan, 91(4), p.044201_1 - 044201_10, 2022/04

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

Recently, $$^{177}$$Lu is considered as one of the most important medical RIs for treating neuroendocrine tumors. A plan to produce $$^{177}$$Lu with high purity by using enriched $$^{176}$$Yb samples with irradiation of deuteron beams in accelerators has been discussed. However, since the other Yb isotopes contained in the Yb sample interacts with deuterons, Lu isotopes other than $$^{177}$$Lu are produced as impurities. Since the purity of $$^{177}$$Lu is important for medical use, a method to evaluate the impurity of Lu has been required. In this study, we proposed a new method to estimate production yields of each Lu isotopes in Yb samples with arbitrary isotopic compositions by using excitation functions of Yb($$d,x$$)Lu reactions and the particle transport calculation code PHITS. The method plays an important role in discussing the isotopic composition of enriched samples to produce high-purity $$^{177}$$Lu using accelerators.

Journal Articles

Abrupt change in electronic states under pressure in new compound EuPt$$_3$$Al$$_5$$

Koizumi, Takatsugu*; Honda, Fuminori*; Sato, Yoshiki*; Li, D.*; Aoki, Dai*; Haga, Yoshinori; Gochi, Jun*; Nagasaki, Shoko*; Uwatoko, Yoshiya*; Kaneko, Yoshio*; et al.

Journal of the Physical Society of Japan, 91(4), p.043704_1 - 043704_5, 2022/04

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

Journal Articles

Mn L$$_{2,3}$$-edge EXAFS and magnetic EXAFS studies on the halfmetallic ferromagnet Co$$_{2}$$MnSi

Kogo, Junya*; Fujiwara, Hidenori*; Sekiyama, Akira*; Saito, Yuji; Umetsu, Rie*; Niki, Kaori*

Journal of the Physical Society of Japan, 91(3), p.034702_1 - 034702_12, 2022/03

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

Journal Articles

Slow electronic dynamics in the paramagnetic state of UTe$$_2$$

Tokunaga, Yo; Sakai, Hironori; Kambe, Shinsaku; Haga, Yoshinori; Tokiwa, Yoshifumi; Opletal, P.; Fujibayashi, Hiroyuki*; Kinjo, Katsuki*; Kitagawa, Shunsaku*; Ishida, Kenji*; et al.

Journal of the Physical Society of Japan, 91(2), p.023707_1 - 023707_5, 2022/02

 Times Cited Count:6 Percentile:97.17(Physics, Multidisciplinary)

$$^{125}$$Te NMR experiments in field ($$H$$) applied along the easy magnetization axis (the $$a$$-axis) revealed slow electronic dynamics developing in the paramagnetic state of UTe$$_2$$. The observed slow fluctuations are concerned with a successive growth of long-range electronic correlations below 30$$-$$40 K, where the spin susceptibility along the hard magnetization axis (the $$b$$-axis) shows a broad maximum. The experiments also imply that tiny amounts of disorder or defects locally disturb the long-range electronic correlations and develop an inhomogeneous electronic state at low temperatures, leading to a low temperature upturn observed in the bulk-susceptibility in $$H|a$$. We suggest that UTe$$_2$$ would be located on the paramagnetic side near an electronic phase boundary, where either the magnetic or Fermi-surface instability would be the origin of the characteristic fluctuations.

Journal Articles

Feedback of superconductivity on the magnetic excitation spectrum of UTe$$_{2}$$

Raymond, S.*; Knafo, W.*; Knebel, G.*; Kaneko, Koji; Brison, J.-P.*; Flouquet, J.*; Aoki, Dai*; Lapertot, G.*

Journal of the Physical Society of Japan, 90(11), p.113706_1 - 113706_5, 2021/11

 Times Cited Count:6 Percentile:79.85(Physics, Multidisciplinary)

Journal Articles

Twisted skyrmion strings in a layered Heisenberg model with dipole-dipole interactions

Yokota, Terufumi

Journal of the Physical Society of Japan, 90(10), p.104701_1 - 104701_5, 2021/10

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

Journal Articles

Nodal lines and boundary modes in topological Dirac semimetals with magnetism

Araki, Yasufumi; Watanabe, Jin*; Nomura, Kentaro*

Journal of the Physical Society of Japan, 90(9), p.094702_1 - 094702_9, 2021/09

 Times Cited Count:1 Percentile:30.66(Physics, Multidisciplinary)

While nodal-line semimetals with magnetism have been theoretically predicted and experimentally observed in a few compounds, idea on the relation between the magnetic order and the electronic structure is still limited. We theoretically explore the electronic structure in bulk and boundary of such a magnetic nodal-line state by introducing magnetism in topological Dirac semimetal (TDSM). TDSMs, such as $$mathrm{Cd_3 As_2}$$ and $$mathrm{Na_3 Bi}$$,are characterized by a pair of spin-degenerate Dirac points protected by rotational symmetries of crystals. By introducing local magnetic moments coupled to the electron spins in the lattice model of TDSM, we show that the TDSM can turn into either a Weyl semimetal or a nodal-line semimetal, which is determined by the orbital dependence in the exchange coupling and the direction of magnetization formed by the magnetic moments. In this magnetic nodal-line semimetal state, we find zero modes with drumhead-like band structure at the boundary that are characterized by the topological number of $$mathbb{Z}$$. Those zero modes are numerically demonstrated by introducing magnetic domain walls in the lattice model.

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