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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

Electronic states in antiferromagnetic compound URhIn$$_5$$ investigated by de Haas-van Alphen effect and high pressure resistivity measurements

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

JPS Conference Proceedings (Internet), 3, p.011097_1 - 011097_5, 2014/06

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

Delocalization of the $$f$$ electron in Ce$$_x$$La$$_{1-x}$$Ru$$_2$$Si$$_2$$; The de Haas-van Alphen effect measurement

Matsumoto, Yuji; Kimura, Noriaki*; Komatsubara, Takemi*; Aoki, Haruyoshi*; Kurita, Nubuyuki*; Terashima, Taichi*; Uji, Shinya*

Journal of Physics; Conference Series, 391, p.012042_1 - 012042_4, 2012/12

 Times Cited Count:1 Percentile:46.08

CeRu$$_2$$Si$$_2$$ is a paramagnetic heavy fermion compound with the electronic specific heat coefficient $$gamma$$ of 350 mJ/mol K$$^2$$. When a magnetic field is applied along the [001] direction of its tetragonal ThCr$$_2$$Si$$_2$$ structure, it exhibits metamagnetic transition at 7.7 T. On the other hand, when a magnetic field is applied in the (001) plane, metamagnetic transition does not occur. This magnetic anisotropy is maintained to lower Ce concentration samples. By replacing Ce with La, CeRu$$_2$$Si$$_2$$ changes to antiferromagnet at $$x_c$$ $$sim$$ 0.91 and finally to normal paramagnet of LaRu$$_2$$Si$$_2$$. In very low Ce concentration samples, the impurity Kondo effect is observed. The Kondo temperature of the $$x$$ = 0.02 sample is about 1 K. We have successfully observed all the dHvA oscillations in the dilute Ce concentration samples with fields in the (001) plane. Moreover, we have observed the variation of the dHvA oscillations with temperature crossing the Kondo temperature.

Journal Articles

Magnetic behavior near the boundary of 4$$f$$ delocalization in ferromagnetic CeRu$$_2$$Ge$$_2$$ and paramagnetic CeRu$$_2$$Si$$_2$$ observed by Ce $$M_{4,5}$$ XAS and XMCD

Okane, Tetsuo; Takeda, Yukiharu; Yamagami, Hiroshi; Fujimori, Atsushi; Matsumoto, Yuji; Kimura, Noriaki*; Komatsubara, Takemi*; Aoki, Haruyoshi*

Physical Review B, 86(12), p.125138_1 - 125138_11, 2012/09

 Times Cited Count:9 Percentile:41.97(Materials Science, Multidisciplinary)

Journal Articles

Resonant angle-resolved photoelectron spectroscopy of substitutional solid solutions of CeRu$$_2$$Si$$_2$$

Okane, Tetsuo; Kawasaki, Ikuto; Yasui, Akira; Okochi, Takuo*; Takeda, Yukiharu; Fujimori, Shinichi; Saito, Yuji; Yamagami, Hiroshi; Fujimori, Atsushi; Matsumoto, Yuji*; et al.

Journal of the Physical Society of Japan, 80(Suppl.A), p.SA060_1 - SA060_3, 2011/07

 Times Cited Count:1 Percentile:12.07(Physics, Multidisciplinary)

Journal Articles

Band structures of CeRu$$_2$$(Si$$_{1-x}$$Ge$$_{x}$$)$$_2$$ studied by resonant soft X-ray ARPES

Okane, Tetsuo; Okochi, Takuo*; Takeda, Yukiharu; Fujimori, Shinichi; Yasui, Akira; Saito, Yuji; Yamagami, Hiroshi; Fujimori, Atsushi; Matsumoto, Yuji*; Sugi, Motoki*; et al.

Physica Status Solidi (B), 247(3), p.397 - 399, 2010/03

Journal Articles

4$$f$$-derived Fermi surfaces of CeRu$$_2$$(Si$$_{1-x}$$Ge$$_{x}$$)$$_2$$ near the quantum critical point; Resonant soft-X-ray ARPES study

Okane, Tetsuo; Okochi, Takuo*; Takeda, Yukiharu; Fujimori, Shinichi; Yasui, Akira; Saito, Yuji; Yamagami, Hiroshi; Fujimori, Atsushi; Matsumoto, Yuji*; Sugi, Motoki*; et al.

Physical Review Letters, 102(21), p.216401_1 - 216401_4, 2009/05

 Times Cited Count:25 Percentile:76.17(Physics, Multidisciplinary)

Journal Articles

Higher-order collinear interaction and magnetic excitation in the 5f localized system U$$_{3}$$Pd$$_{20}$$Si$$_{6}$$

Metoki, Naoto; Koike, Yoshihiro; Haga, Yoshinori; Kaneko, Koji; Araki, Shingo; McEwen, K. A.*; Kogi, Masafumi*; Aso, Naofumi*; Lander, G. H.; Komatsubara, Takemi*; et al.

Journal of Physics; Condensed Matter, 15(28), p.S1957 - S1963, 2003/07

 Times Cited Count:2 Percentile:15.73(Physics, Condensed Matter)

no abstracts in English

Journal Articles

Magnetic structure, phase diagram, and a new type of spin-flop transition dominated by higher order interaction in a localized 5$$f$$ system U$$_{3}$$Pd$$_{20}$$Si$$_{6}$$

Koike, Yoshihiro; Metoki, Naoto; Haga, Yoshinori; McEwen, K. A.*; Kogi, Masafumi*; Yamamoto, Ryunosuke*; Aso, Naofumi*; Tateiwa, Naoyuki*; Komatsubara, Takemi*; Kimura, Noriaki*; et al.

Physical Review Letters, 89(7), p.077202_1 - 077202_4, 2002/08

 Times Cited Count:7 Percentile:48.12(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Neutron scattering experiment on U$$_3{}$$Pd$$_{20}$$Si$$_{6}$$, 1; Crystal and magnetic structure

Tateiwa, Naoyuki*; Metoki, Naoto; Koike, Yoshihiro; Oikawa, Kenichi*; Kimura, Noriaki*; Aoki, Haruyoshi*; Komatsubara, Takemi*

Physica B; Condensed Matter, 312-313, p.891 - 893, 2002/03

 Times Cited Count:0 Percentile:0(Physics, Condensed Matter)

no abstracts in English

Journal Articles

Neutron scattering study on the crystal structure, magnetic ordering, and crystalline electric field excitations in an uranium metallic compound U$$_{3}$$Pd$$_{20}$$Si$$_{6}$$

Tateiwa, Naoyuki*; Metoki, Naoto; Koike, Yoshihiro; Oikawa, Kenichi; Kimura, Noriaki*; Komatsubara, Takemi*; Aoki, Haruyoshi*

Journal of the Physical Society of Japan, 70(8), p.2425 - 2436, 2001/08

 Times Cited Count:14 Percentile:62.86(Physics, Multidisciplinary)

no abstracts in English

Oral presentation

Soft X-ray angle-resolved photoelectron spectroscopy of CeRu$$_2$$(Si$$_{1-x}$$Ge$$_x$$)$$_2$$

Okane, Tetsuo; Okochi, Takuo; Fujimori, Shinichi; Takeda, Yukiharu; Yasui, Akira; Saito, Yuji; Yamagami, Hiroshi; Fujimori, Atsushi; Matsumoto, Yuji*; Kimura, Noriaki*; et al.

no journal, , 

no abstracts in English

Oral presentation

Resonant angle-resolved photoemission study of CeRu$$_2$$(Si$$_{1-x}$$Ge$$_x$$)$$_2$$ and Ce$$_{1-x}$$La$$_x$$Ru$$_2$$Si$$_2$$

Okane, Tetsuo; Okochi, Takuo*; Yasui, Akira; Kawasaki, Ikuto; Fujimori, Shinichi; Takeda, Yukiharu; Saito, Yuji; Yamagami, Hiroshi; Fujimori, Atsushi; Matsumoto, Yuji*; et al.

no journal, , 

no abstracts in English

Oral presentation

Fermi surfaces of substitutional solid solution system of CeRu$$_2$$Si$$_2$$ studied by resonant angle-resolved photoelectron spectroscopy

Okane, Tetsuo; Okochi, Takuo*; Yasui, Akira; Kawasaki, Ikuto; Fujimori, Shinichi; Takeda, Yukiharu; Saito, Yuji; Yamagami, Hiroshi; Fujimori, Atsushi; Matsumoto, Yuji*; et al.

no journal, , 

no abstracts in English

Oral presentation

Change of Fermi surface properties in dilute Ce concentration of Ce$$_x$$La$$_{1-x}$$Ru$$_2$$Si$$_2$$ system, 3

Matsumoto, Yuji; Kimura, Noriaki*; Komatsubara, Takemi*; Aoki, Haruyoshi*; Kurita, Nubuyuki*; Terashima, Taichi*; Uji, Shinya*

no journal, , 

We have performed the de Haas - van Alphen (dHvA) effect measurements in Ce$$_x$$La$$_{1-x}$$Ru$$_2$$Si$$_2$$ with magnetic fields in the (001) plane. All the oscillations corresponding to those in LaRu$$_2$$Si$$_2$$ can be observed in low Ce concentration samples and the evolution of the Fermi surface properties with x is found to depend strongly on the Fermi surface sheet. We will argue that the evolution can be attributed to anisotropic hybridization of the f electron with conduction electrons and resultant delocalization of the f electron.

Oral presentation

X-ray magnetic circular dichroism study at Ce $$M_{4,5}$$ edges of CeRu$$_2$$Si$$_2$$ and CeRu$$_2$$Ge$$_2$$

Okane, Tetsuo; Takeda, Yukiharu; Yamagami, Hiroshi; Fujimori, Atsushi; Matsumoto, Yuji; Kimura, Noriaki*; Komatsubara, Takemi*; Aoki, Haruyoshi*

no journal, , 

no abstracts in English

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