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

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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

Ryogo Kubo Mario Yokota Sadao Nakajima

出版者

一般社団法人 日本物理学会

雑誌

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

巻号頁・発行日

vol.12, no.11, pp.1203-1211, 1957-11-05 (Released:2007-06-01)

参考文献数

23

被引用文献数

573

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The possibility is examined to give rigorous expressions for kinetic coefficients such as heat conductivity, diffusion constant, thermoelectric power and so on which relate the flow of a certain kind to the generalized forces of thermal nature. We take here as the fundamental assumption Onsager’s assumption that the average regression of spontaneous fluctuation of macroscopic variables follows the macroscopic physical laws. The kinetic coefficient Gjl appearing in the phenomenological equation, \dotαj=∑Gjl(∂S⁄∂αl) is shown then to be expressed asGjl=(kβ)−1∫0∞dτ∫0β<\dotαl(−ihλ)\dotαj(τ)>dλwhere k is the Boltzmann constant and β=1⁄kT. This is the same type of formula as we have for kinetic coefficients for mechanical disturbances (Kubo, J. Phys. Soc. 12 (1957) 570). The theory is illustrated for the example of electronic transport phenomena.

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

Iwata Yutaka Koyano Nobumitsu Shibuya Iwao

出版者

一般社団法人日本物理学会

雑誌

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

巻号頁・発行日

vol.49, no.1, pp.304-307, 1980-07-15

被引用文献数

1 47

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Hydrogerx atoms in fezroelectric phase of CSH.PO4 have been located frounlow tentperature neutron diffraction experimetat. Chains of hydrogen bondsextendiucg to both the crystallographic b- and c-axes are confirmed. The hydrogenatom in a shorter 0-I-[? = O bond becomes ordered ?tt low temperature phase withb6nd length 0-H-=1.02A auad H-0=1'.46A. Structural change?.be]ow T.shows that the laydrogen ordering acconapanies a slight rotation of P04 tetra-hedron about the one P-0 bond.

著者

Miyazima Sasuke Tanaka Tomoyasu

出版者

一般社団法人日本物理学会

雑誌

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

巻号頁・発行日

vol.56, no.2, pp.441-443, 1987-02-15

被引用文献数

3 5

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Diffusion limited aggregation is generalized to include a method of ensembleaverage, and is applied to the sirnulati'on of a snowflake as an example.

著者

Kawai Hiroshi Nakamura Yoshimichi Nakayama Masatoshi

出版者

一般社団法人日本物理学会

雑誌

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

巻号頁・発行日

vol.68, no.12, pp.3936-3940, 1999-12-15

被引用文献数

12

---

Tlae time resolving dynanaical lVIorate Carlo sirtatrlatiozas(DIVICS) on 21 narroxv 81(001)Sj3 terraceare perforzned witla the parttuneters obtairtecl frozta tlae first-prittciples procedttres. It is shoxx'ua thatthe two-body tiraae-correlation f'trnctions of the systeutu correspond to those of tlae ideal kineticone-diraaerasional Isitag systern. The dyraaraaical f'eattrre of tl'te flip-flop tnotion of diraaers ita tl'nesysteuaa is xvell described by the ideal kinetic one-diuaaetasiortal Isirag systetn. Tlue orae-diuauetasioraalkinetic transition rates 011 tlue systerta are obtaitaed. The orae-diuaaensiotaal flucttration of' tlaesystern is enotrgh SIOXV to be observed by STINT at realistic teraaperattnr'e.

著者

Miyazaki Takeshi Ueno Koki Shimonishi Tomoyuki

出版者

一般社団法人日本物理学会

雑誌

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

巻号頁・発行日

vol.68, no.8, pp.2592-2601, 1999-08-15

被引用文献数

3 13

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Vortex uraotions ita 21 st?t]o1.5?' str'atified rotsrtiuag fltzid atre cozt,';idered tJueoreticatJJy, loatsed on theqtmz?sigeostrophic apjcroxiuaaatiouu, A [12188 of' ex;tct soltrtiota is obt?'titaed, xvhicla repr'esents a tiltedspher'oid?tl X'OlUll'I1Q xvitla trr'nifortaa potetuti?tl vorticit3' etnbedded in an otlaerxx'ise qtriescent [ltrid of'infitaite extetat. The splaet'oid rotates steadily' ;rbotrt t1?e x'ertical axis, v,rlaere the ?tngv.u1trr xzelocit3z isitudependetat of' Cite inc[it??ttiota attagle of' the a?xis of.' syuaamaaetry f'rota? tlte xrertical axis. XVe study Cluestability"of'tluese soJtztion,'s atg?rizast izafiuaitesiuaaztl disfturloattaces. Hig1u1.y elongated prelate splaeroidsare shoxx'ru to be trrastalole if tlae iraclinsttiort ;ttagle is latrge. In corutr?xst, ololate sjclaeroids of' certairnaspect r;xtio are trtastable ex'etu if' Clue itaclita;ttiora att?gle is xzery $1112111. Tlais irastability is c;tu-sed byresorusrce betx",'eeta tlae tilted re{;ttuorm artd otI?er disttrr'1o?ttace maaodes.

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

Yamada Isao

出版者

一般社団法人日本物理学会

雑誌

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

巻号頁・発行日

vol.33, no.4, pp.979-988, 1972-10-05

被引用文献数

4 198

---

It has been found that K_2CuF_4 is ferromagnetic below 6.25K. The two-dimensionality of this compound as expected from its K_2NiF_4 type structure is strongly supported by magnetic and specific heat measurements. The torque as well as zero field NMR measurements suggest that the c-plane is an easy plane, in which the spins are very weakly bounded to the direction of a-axia. On the assumption that this magnetic system to be purely two-dimensional, the exchange interaction J between tha spins within the c-plane is found to be the Heisenberg type with about one percent XY-like anisotropy and j/k=10.0K is obtained from the series expansion analysis of the high temperature susceptibility as well as linear dependence of the low temperature specific heat. The transition at 6.25K may be caused by inter-layer exchange interaction. The exchange field between the adjacent layers is expected at least larger than 400 Oe.

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

Kosuke Morita Kouji Morimoto Daiya Kaji Takahiro Akiyama Sin-ichi Goto Hiromitsu Haba Eiji Ideguchi Rituparna Kanungo Kenji Katori Hiroyuki Koura Hisaaki Kudo Tetsuya Ohnishi Akira Ozawa Toshimi Suda Keisuke Sueki HuShan Xu Takayuki Yamaguchi Akira Yoneda Atsushi Yoshida YuLiang Zhao

出版者

一般社団法人 日本物理学会

雑誌

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

巻号頁・発行日

vol.73, no.10, pp.2593-2596, 2004-10-15 (Released:2007-07-25)

参考文献数

16

被引用文献数

461

---

The convincing candidate event of the isotope of the 113th element, 278113, and its daughter nuclei, 274111 and 270Mt, were observed, for the first time, in the 209Bi+70Zn reaction at a beam energy of 349.0 MeV with a total dose of 1.7×1019. Alpha decay energies and decay times of the candidates, 278113, 274111, and 270Mt, were (11.68±0.04 MeV, 0.344 ms), (11.15±0.07 MeV, 9.26 ms), and (10.03±0.07 MeV, 7.16 ms), respectively. The production cross section of the isotope was deduced to be 55+150−45 fb (10−39 cm2).

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

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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

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.