著者

Vodicka Václav

出版者

THE PHYSICAL SOCIETY OF JAPAN

雑誌

Journal of the Physical Society of Japan (ISSN:00319015)

巻号頁・発行日

vol.16, no.8, pp.1630-1636, 1961

被引用文献数

4

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Classical methods are used to determine the steady temperature distribution in a finite elliptic cylinder consisting of any number of plane-parallel layers. As illustration of the general procedure, the case of a homogeneous isotropic elliptic cylinder is treated in some detail.

著者

Sakurai Takahiro Hirao Yuki Hijii Keigo Okubo Susumu Ohta Hitoshi Uwatoko Yoshiya Kudo Kazutaka Koike Yoji

出版者

The Physical Society of Japan

雑誌

Journal of the Physical Society of Japan (ISSN:00319015)

巻号頁・発行日

vol.87, no.3, 2018-02-01

被引用文献数

36

著者

Kuboki Kazuhiro

出版者

The Physical Society of Japan

雑誌

Journal of the Physical Society of Japan (ISSN:00319015)

巻号頁・発行日

vol.87, no.2, 2017-12-27

被引用文献数

3

著者

Okamoto Tsubasa Ohmichi Eiji Okubo Susumu Ohta Hitoshi

出版者

The Physical Society of Japan

雑誌

Journal of the Physical Society of Japan (ISSN:00319015)

巻号頁・発行日

vol.87, no.1, 2017-12-06

被引用文献数

10

著者

KIRAKOSYAN Zara SAAKIAN David B. HU Chin-Kun

出版者

The Physical Society of Japan

雑誌

J Phys Soc Jpn (ISSN:00319015)

巻号頁・発行日

vol.81, no.11, pp.114801-114801-4, 2012-11-15

被引用文献数

8

---

We consider the Eigen model with non-Poisson distribution of mutation number. We apply the Hamilton--Jacobi equation method to solve the model and calculate the mean fitness. We find that the error threshold depends on the correlation, and the suggested mechanism may give a simple solution to the error catastrophe paradox in the origin of life.

著者

Ito Yukako Kojima Osamu Kita Takashi Shim YongGu

出版者

The Physical Society of Japan

雑誌

Journal of the Physical Society of Japan (ISSN:00319015)

巻号頁・発行日

vol.86, no.9, 2017-08-31

被引用文献数

1

著者

鈴木 貞吉

出版者

The Physical Society of Japan

雑誌

日本物理学会講演概要集 (ISSN:21890803)

巻号頁・発行日

pp.1, 2016-03-19 (Released:2017-07-10)

著者

Omori Toshiaki Sekiguchi Tomoki Okada Masato

出版者

The Physical Society of Japan

雑誌

Journal of the Physical Society of Japan (ISSN:00319015)

巻号頁・発行日

vol.86, no.8, 2017-07-11

被引用文献数

4

著者

Takei Chiharu Makita Yasuharu

出版者

The Physical Society of Japan

雑誌

Journal of the Physical Society of Japan (ISSN:00319015)

巻号頁・発行日

vol.49, no.1,

被引用文献数

13

著者

Okamoto Kiyomi Tonegawa Takashi Sakai Toru

出版者

The Physical Society of Japan

雑誌

Journal of the Physical Society of Japan (ISSN:00319015)

巻号頁・発行日

vol.85, no.6, pp.63704-1-4, 2016-05-23

被引用文献数

5

---

We investigate the ground-state phase diagram of the bond-alternating <italic>S</italic>= 2 quantum spin chain with the <italic>XXZ</italic>and on-site anisotropies. For the on-site anisotropies, in addition to the popular <inline-formula><tex-math version="MathJax"><![CDATA[\(D_{2}\sum\nolimits_{j} (S_{j}^{z})^{2}\)]]></tex-math></inline-formula>term, we consider the <inline-formula><tex-math version="MathJax"><![CDATA[\(D_{4}\sum\nolimits_{j} (S_{j}^{z})^{4}\)]]></tex-math></inline-formula>term. Mainly we use the exact diagonalization and the level spectroscopy analysis. We show that the Haldane state, large-<italic>D</italic>state and the Dimer2 state belong to the same trivial phase, by finding the existence of adiabatic paths directly connecting these states without the quantum phase transition. Similarly, we show that the intermediate-<italic>D</italic>state and the Dimer1 state belong to the same symmetry protected topological phase.

著者

Teruya Atsushi Suzuki Fuminori Aoki Dai Honda Fuminori Nakamura Ai Nakashima Miho Amako Yasushi Harima Hisatomo Hedo Masato Nakama Takao Onuki Yoshichika

出版者

The Physical Society of Japan

雑誌

Journal of the Physical Society of Japan (ISSN:00319015)

巻号頁・発行日

vol.85, no.6, pp.64716-1-10, 2016-06-01

被引用文献数

11

---

We succeeded in growing high-quality single crystals of the pyrite-type cubic compounds CoSe₂and CoS₂using the transport agent CoBr₂and measured the electrical resistivity, specific heat, magnetic susceptibility, magnetization, and de Haas–van Alphen (dHvA) effect. We confirmed that CoSe₂is an exchange-enhanced paramagnet revealing a broad maximum at around 50 K in the temperature dependence of the magnetic susceptibility. The electronic specific heat coefficient is moderately large, γ = 18 mJ/(K²·mol). On the other hand, CoS₂is a ferromagnet with a Curie temperature <italic>T</italic>_C= 122 K and an ordered moment μ_s= 0.93 μ_B/Co. The γ of 21 mJ/(K²·mol) of CoS₂is slightly larger than that of CoSe₂. A large ordered moment, together with a large γ, is characteristic of CoS₂because CoS₂is a half-metallic spin state in the ferromagnetic state. Correspondingly, we detected a main dHvA branch with a large cyclotron effective mass of 13<italic>m</italic>₀in the dHvA experiments. The detected dHvA branches in CoS₂and CoSe₂are discussed on the basis of the results of energy band calculations, revealing a broken fourfold symmetry in the angular dependence of the dHvA frequency.

著者

Okamoto Kiyomi Tonegawa Takashi Sakai Toru

出版者

The Physical Society of Japan

雑誌

Journal of the Physical Society of Japan (ISSN:00319015)

巻号頁・発行日

vol.85, no.6, pp.63704-1-4, 2016-05-23

被引用文献数

5

---

We investigate the ground-state phase diagram of the bond-alternating <italic>S</italic>= 2 quantum spin chain with the <italic>XXZ</italic>and on-site anisotropies. For the on-site anisotropies, in addition to the popular <inline-formula><tex-math version="MathJax"><![CDATA[\(D_{2}\sum\nolimits_{j} (S_{j}^{z})^{2}\)]]></tex-math></inline-formula>term, we consider the <inline-formula><tex-math version="MathJax"><![CDATA[\(D_{4}\sum\nolimits_{j} (S_{j}^{z})^{4}\)]]></tex-math></inline-formula>term. Mainly we use the exact diagonalization and the level spectroscopy analysis. We show that the Haldane state, large-<italic>D</italic>state and the Dimer2 state belong to the same trivial phase, by finding the existence of adiabatic paths directly connecting these states without the quantum phase transition. Similarly, we show that the intermediate-<italic>D</italic>state and the Dimer1 state belong to the same symmetry protected topological phase.

著者

Kinugawa Tohru Furuhashi Osamu

出版者

The Physical Society of Japan

雑誌

Journal of the Physical Society of Japan (ISSN:00319015)

巻号頁・発行日

vol.85, no.1, 2015-12-08

著者

Nakamura Ai Uejo Taro Honda Fuminori Takeuchi Tetsuya Harima Hisatomo Yamamoto Etsuji Haga Yoshinori Matsubayashi Kazuyuki Uwatoko Yoshiya Hedo Masato Nakama Takao Ōnuki Yoshichika

出版者

The Physical Society of Japan

雑誌

Journal of the Physical Society of Japan (ISSN:00319015)

巻号頁・発行日

vol.84, no.12, 2015-11-26

被引用文献数

36

著者

Kakihana Masashi Teruya Atsushi Nishimura Kengo Nakamura Ai Takeuchi Tetsuya Haga Yoshinori Harima Hisatomo Hedo Masato Nakama Takao Ōnuki Yoshichika

出版者

The Physical Society of Japan

雑誌

Journal of the Physical Society of Japan (ISSN:00319015)

巻号頁・発行日

vol.84, no.9, pp.94711-1-8, 2015-08-21

被引用文献数

17

---

We grew single crystals of ullmannite NiSbS and PbBiSe with the cubic chiral structure and carried out electrical resistivity, specific heat, and de Haas–van Alphen (dHvA) experiments to clarify their Fermi surface properties. The Fermi surfaces were found to split into two, reflecting the non-centrosymmetric crystal structure. The splitting energies between the two nearly spherical electron Fermi surfaces named α and α′ were determined as 220 K in NiSbS and 1050 K in PdBiSe for <italic>H</italic>|| [100] or [001]. This difference in splitting energies between the two compounds originates mainly from the fact that the spin–orbit interactions of Ni-3<italic>d</italic>, Sb-5<italic>p</italic>, and S-3<italic>p</italic>electrons in NiSbS are smaller in magnitude than those of Pd-4<italic>d</italic>, Bi-6<italic>p</italic>, and Se-4<italic>p</italic>electrons in PdBiSe, respectively.

著者

Ziro KOBA Takao TANI Sin-ichiro TOMONAGA

出版者

THE PHYSICAL SOCIETY OF JAPAN

雑誌

Progress of Theoretical Physics (ISSN:0033068X)

巻号頁・発行日

vol.2, no.4, pp.198-208, 1947 (Released:2006-03-27)

参考文献数

5

被引用文献数

18

著者

Kubo Tetsuro Kotegawa Hisashi Tou Hideki Higashinaka Ryuji Nakama Akihiro Aoki Yuji Sato Hideyuki

出版者

The Physical Society of Japan

雑誌

Journal of the Physical Society of Japan (ISSN:00319015)

巻号頁・発行日

vol.84, no.7, 2015-06-05

被引用文献数

14

著者

Kuboki Kazuhiro

出版者

The Physical Society of Japan

雑誌

Journal of the Physical Society of Japan (ISSN:00319015)

巻号頁・発行日

vol.84, no.6, pp.64706-1-5, 2015-05-13

被引用文献数

4

---

We study surface states of high-<italic>T</italic>_Ccuprate superconductor YBCO using the bilayer <italic>t</italic>–<italic>J</italic>model. Calculations based on the Bogoliubov de Gennes method show that a flux phase that breaks time-reversal symmetry (<inline-formula><tex-math version="MathJax"><![CDATA[\(\mathcal{T}\)]]></tex-math></inline-formula>) may arise near a (110) surface where the <inline-formula><tex-math version="MathJax"><![CDATA[\(d_{x^{2} - y^{2}}\)]]></tex-math></inline-formula>-wave superconductivity is strongly suppressed. It is found that the flux phase in which spontaneous magnetic fields in two layers have opposite directions may be stabilized in a wide region of doping rate, and split peaks in the local density of states appear. Near the surface, spontaneous magnetic field may not be observed experimentally, because the contributions from two layers essentially cancel out. This may explain the absence of local magnetic field near the (110) surface of YBCO, for which the sign of <inline-formula><tex-math version="MathJax"><![CDATA[\(\mathcal{T}\)]]></tex-math></inline-formula>violation has been detected.

著者

Kotegawa Hisashi Fukumoto Kenta Toyama Toshihiro Tou Hideki Harima Hisatomo Harada Atsushi Kitaoka Yoshio Haga Yoshinori Yamamoto Etsuji Ōnuki Yoshichika Itoh Kohei M. Haller Eugene E.

出版者

The Physical Society of Japan

雑誌

Journal of the Physical Society of Japan (ISSN:00319015)

巻号頁・発行日

vol.84, no.5, 2015-04-27

被引用文献数

26

著者

SUZUKI Shugo OHTA Hidehisa

出版者

The Physical Society of Japan

雑誌

Journal of the Physical Society of Japan (ISSN:00319015)

巻号頁・発行日

vol.79, no.07, pp.074703, 2010-06-25

被引用文献数

3 3

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We study the orbital, spin, and total magnetic moments in uranium monochalcogenides, UX where X=S, Se, and Te, using the fully relativistic full-potential calculations based on the spin density functional theory. In particular, the orbital magnetic moments are calculated with the Dirac current. We employ two methods which adopt distinctly different basis sets; one is the fully relativistic full-potential linear-combination-of-atomic-orbitals (FFLCAO) method and the other is the fully relativistic full-potential mixed-basis (FFMB) method. Showing that the orbital magnetic moments calculated using the FFLCAO method and those calculated using the FFMB method agree very well with each other, we demonstrate that, in contrast to the conventional method, the method with the Dirac current enables us to calculate the orbital magnetic moments even if the basis set includes basis functions with no definite angular momenta, e.g., the plane waves in the FFMB method. Furthermore, it is found that the orbital magnetic moments obtained in this work are larger by nearly 0.4 µB than those obtained using the conventional method. This is crucial because the resultant differences in the total magnetic moments are about 30%. We compare the results of this work with those of previous theoretical and experimental studies.