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Journal Articles

Quasi-one-dimensional magnetic interactions and conduction electrons in EuCu$$_5$$ and EuAu$$_5$$ with the characteristic hexagonal structure

Matsuda, Shinya*; Ota, Joji*; Nakaima, Kenri*; Iha, Wataru*; Gochi, Jun*; Uwatoko, Yoshiya*; Nakashima, Miho*; Amako, Yasushi*; Honda, Fuminori*; Aoki, Dai*; et al.

Philosophical Magazine, 100(10), p.1244 - 1257, 2020/04

 Times Cited Count:2 Percentile:45.37(Materials Science, Multidisciplinary)

Journal Articles

Single crystal growth and unique electronic states of cubic chiral EuPtSi and related compounds

Onuki, Yoshichika*; Kakihana, Masashi*; Iha, Wataru*; Nakaima, Kenri*; Aoki, Dai*; Nakamura, Ai*; Honda, Fuminori*; Nakashima, Miho*; Amako, Yasushi*; Gochi, Jun*; et al.

JPS Conference Proceedings (Internet), 29, p.012001_1 - 012001_9, 2020/02

Journal Articles

Electronic structure in heavy fermion compound UPd$$_2$$Al$$_3$$ through directional Compton profile measurement

Koizumi, Akihisa*; Kubo, Yasunori*; Yamamoto, Etsuji; Haga, Yoshinori; Sakurai, Yoshiharu*

Journal of the Physical Society of Japan, 88(3), p.034714_1 - 034714_6, 2019/03

 Times Cited Count:1 Percentile:20.66(Physics, Multidisciplinary)

Journal Articles

Fermi surface of ThRu$$_{2}$$Si$$_{2}$$ as a reference to the strongly correlated isostructural metals investigated by quantum oscillations

Matsumoto, Yuji*; Haga, Yoshinori; Tateiwa, Naoyuki; Aoki, Haruyoshi*; Kimura, Noriaki*; Yamamura, Tomoo*; Yamamoto, Etsuji; Matsuda, Tatsuma*; Fisk, Z.*; Yamagami, Hiroshi*

Journal of the Physical Society of Japan, 85(10), p.104709_1 - 104709_7, 2016/10

 Times Cited Count:2 Percentile:24.48(Physics, Multidisciplinary)

Journal Articles

Split Fermi surface properties in Ulmannite NiSbS and PdBiSe with the cubic chiral crystal structure

Kakihana, Masashi*; Teruya, Atsushi*; Nishimura, Kengo*; Nakamura, Ai*; Takeuchi, Tetsuya*; Haga, Yoshinori; Harima, Hisatomo*; Hedo, Masato*; Nakama, Takao*; Onuki, Yoshichika

Journal of the Physical Society of Japan, 84(9), p.094711_1 - 094711_8, 2015/09

 Times Cited Count:13 Percentile:70.14(Physics, Multidisciplinary)

Journal Articles

Single-crystal growth and de Haas-van Alphen effect study of ThRu$$_2$$Si$$_2$$

Matsumoto, Yuji*; Haga, Yoshinori; Tateiwa, Naoyuki; Aoki, Haruyoshi*; Kimura, Noriaki*; Matsuda, Tatsuma*; Yamamoto, Etsuji; Fisk, Z.; Yamagami, Hiroshi*

JPS Conference Proceedings (Internet), 3, p.011096_1 - 011096_5, 2014/06

Journal Articles

Single crystal growth and fermi surface properties of ThIn$$_3$$

Matsuda, Tatsuma; Haga, Yoshinori; Ikeda, Shugo; Shishido, Hiroaki*; Settai, Rikio*; Harima, Hisatomo*; Onuki, Yoshichika

Journal of the Physical Society of Japan, 74(12), p.3276 - 3282, 2005/12

 Times Cited Count:11 Percentile:56.88(Physics, Multidisciplinary)

We have succeeded in growing a high-quality single crystal of ThIn$$_3$$ with the cubic structure by the In-flux method and measured the electrical resistivity, magnetic susceptibility and de Haas-van Alphen (dHvA) effect. Several dHvA branches were observed, ranging from 5.2 $$times$$ 10$$^6$$ to 1.7 $$times$$ 10$$^8$$ Oe. The Fermi surface consists of a nearly spherical Fermi surface and a multiply-connected Fermi surface with many but small extremal cross-sections. The corresponding cyclotron effective masses are small, ranging from 0.31 to 1.4 $$m_0$$. These Fermi surface properties are well explained by the energy band calculations based on the FLAPW method.

Journal Articles

First observation of de Haas-van Alphen effect in PuIn$$_3$$

Haga, Yoshinori; Aoki, Dai*; Yamagami, Hiroshi*; Matsuda, Tatsuma; Nakajima, Kunihisa; Arai, Yasuo; Yamamoto, Etsuji; Nakamura, Akio; Homma, Yoshiya*; Shiokawa, Yoshinobu; et al.

Journal of the Physical Society of Japan, 74(11), p.2889 - 2892, 2005/11

 Times Cited Count:24 Percentile:73.44(Physics, Multidisciplinary)

We observed for the first time the de Haas-van Alphen oscillation in a paramagnet PuIn$$_3$$. One detected dHvA branch named $$gamma$$ corresponds to a closed band-27 electron Fermi surface, where three kinds of closed Fermi surfaces are calculated on the basis of the 5$$f$$-itinerant band model. The cyclotron mass of branch $$gamma$$ was determined as 4.8 $$m_0$$. The dHvA signals are found to be extremely reduced as a function of time due to point defects produced by $$alpha$$-decay of $$^{239}$$Pu.

Journal Articles

Electronic structure and the Fermi surface of PuCoGa$$_5$$ and NpCoGa$$_{5}$$

Maehira, Takahiro; Hotta, Takashi; Ueda, Kazuo; Hasegawa, Akira*

Physical Review Letters, 90(20), p.207007_1 - 207007_4, 2003/05

 Times Cited Count:93 Percentile:92.99(Physics, Multidisciplinary)

By using a relativistic linear augmented-plane-wave method, we clarify energy band structures and Fermi surfaces of recently discovered plutonium-based superconductor PuCoGa$$_5$$. We find several cylindrical sheets of Fermi surfaces with large volume, quite similar to CeMIn$$_5$$ (M=Ir and Co) isostructural with PuCoGa$$_5$$, in spite of different $$f$$-electron numbers between Ce$$^{3+}$$ and Pu$$^{3+}$$ ions. This similarity is simply understood by a concept of electron-hole conversion in a tight binding model constructed based on the $$j$$-$$j$$ coupling scheme. Due to the present results, we provide a possible scenario to explain why a transition temperature is so high as 18.5K in PuCoGa$$_5$$.

Journal Articles

Relativistic band-structure calculations for CeTIn$$_5$$(T=Ir and Co) and analysis of the energy bands by using tight-binding method

Maehira, Takahiro; Hotta, Takashi; Ueda, Kazuo; Hasegawa, Akira*

Journal of the Physical Society of Japan, 72(4), p.854 - 864, 2003/04

 Times Cited Count:73 Percentile:90.69(Physics, Multidisciplinary)

In order to investigate electronic properties of recently discovered heavy fermion superconductors CeTIn$$_5$$ (T=Ir and Co), we employ the relativistic linear augmented-plane-wave (RLAPW) method to clarify the energy band structures and Fermi surfaces of those materials.The obtained energy bands mainly due to the large hybridization between Ce $$4f$$ and In 5$$p$$ states well reproduce the Fermi surfaces consistent with the de Haas-van Alphen experimental results. For the purpose, we construct a tight-binding model for CeTIn$$_5$$ by including $$f$$-$$f$$ and $$p$$-$$p$$ hoppings as well as $$f$$-$$p$$ hybridization, which are expressed by the Slater-Koster integrals, determined by the direct comparison with the band-calculation result. Similarity and difference between CeIrIn$$_5$$ and CeCoIn$$_5$$ are discussed based on the obtained tight-binding model, suggesting a significant importance of the effect of crystalline electric field to understand the difference in electronic properties among CeTIn$$_5$$.

Journal Articles

Quasi-two dimensional electronic state of the antiferromagnet UPtGa$$_5$$

Ikeda, Shugo; Tokiwa, Yoshifumi*; Haga, Yoshinori; Yamamoto, Etsuji; Okubo, Tomoyuki*; Yamada, Mineko*; Nakamura, Noriko*; Sugiyama, Kiyohiro*; Kindo, Koichi*; Inada, Yoshihiko*; et al.

Journal of the Physical Society of Japan, 72(3), p.576 - 581, 2003/03

 Times Cited Count:41 Percentile:83.42(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Fermi surface study in uranium-based intermetallic compounds

Haga, Yoshinori; Yamamoto, Etsuji; Tokiwa, Yoshifumi; Aoki, Dai*; Inada, Yoshihiko*; Settai, Rikio*; Maehira, Takahiro; Yamagami, Hiroshi*; Harima, Hisatomo*; Onuki, Yoshichika

Journal of Nuclear Science and Technology, 39(Suppl.3), p.56 - 62, 2002/11

Fermi surfaces of uranium compounds are investigated by de Haas-van Alphen (dHvA) effect. Band calculations well reproduce the Fermi surfaces of non-magnetic itinerant systems such as USi$$_{3}$$, UC, UAl$$_{3}$$. Fermi surfaces of the heavy fermion compounds, where the strong correlation between carriers are important, are also explained by band calculations, except for their unusually large mass enhancement. We have also observed dHvA oscillations in the superconducting mixed states in heavy fermion superconductors such as URu$$_{2}$$Si$$_{2}$$, UPd$$_{2}$$Al$$_{3}$$ and CeRu$$_{2}$$. A significan field dependence of cyclotron effective mass and scattering life time were observed.

Journal Articles

De Haas-van Alphen effect on PrRu$$_4$$Sb$$_{12}$$

Matsuda, Tatsuma; Abe, Keisuke*; Watanuki Fumihito*; Sugawara, Hitoshi*; Aoki, Yuji*; Sato, Hideyuki*; Inada, Yoshihiko*; Settai, Rikio*; Onuki, Yoshichika

Physica B; Condensed Matter, 312-313, p.832 - 833, 2002/03

 Times Cited Count:20 Percentile:68.32(Physics, Condensed Matter)

The angular dependence of de Haas-van Alphen effect has been measured to reveal the electronic structure of filled skutterudite PrRu$$_4$$Sb$$_{12}$$. The angular dependence of de Haas-van Alphen frequency of PrRu$$_4$$Sb$$_{12}$$ is in good agreement with that of LaRu$$_4$$Sb$$_{12}$$. Compared with PrFe$$_4$$P$$_{12}$$, no anomalous enhancement of cyclotron effective mass has been observed in this system. This change of electronic structure is attributed to the difference in the $$c-f$$ hybridization strength, which is expected from the large difference in the lattice parameters.

Oral presentation

5$$f$$-contributions to Fermi surfaces in (U,Th)Ru$$_2$$Si$$_2$$

Haga, Yoshinori

no journal, , 

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