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  • Takayoshi Yokoya
2020

Change in the electronic structure of the bismuth chalcogenide superconductor CsBi4-xPbxTe6 by dissociation of the bismuth dimers

Okazaki, H., Terashima, K., Billington, D., Iwata, K., Wakita, T., Tanaka, M., Takano, Y., Muraoka, Y. & Yokoya, T., Apr 3 2020, In : Journal of Physics Condensed Matter. 32, 14, 145501.

Research output: Contribution to journalArticle

Formation of Q-carbon by adjusting sp3 content in diamond-like carbon films and laser energy density of pulsed laser annealing

Yoshinaka, H., Inubushi, S., Wakita, T., Yokoya, T. & Muraoka, Y., Oct 15 2020, In : Carbon. 167, p. 504-511 8 p.

Research output: Contribution to journalArticle

Skewed electronic band structure induced by electric polarization in ferroelectric BaTiO3

Oshime, N., Kano, J., Ikenaga, E., Yasui, S., Hamasaki, Y., Yasuhara, S., Hinokuma, S., Ikeda, N., Janolin, P. E., Kiat, J. M., Itoh, M., Yokoya, T., Fujii, T., Yasui, A. & Osawa, H., Dec 1 2020, In : Scientific reports. 10, 1, 10702.

Research output: Contribution to journalArticle

Open Access

Strain effects on spinodal decomposition in TiO2–VO2films on TiO2(100) substrates

Muraoka, Y., Yoshii, F., Fukuda, T., Manabe, Y., Yasuno, M., Takemoto, Y., Terashima, K., Wakita, T. & Yokoya, T., Mar 31 2020, In : Thin Solid Films. 698, 137854.

Research output: Contribution to journalArticle

2018

Determination of the local structure of Sr2-xMxIrO4 (M = K, La) as a function of doping and temperature

Terashima, K., Paris, E., Salas-Colera, E., Simonelli, L., Joseph, B., Wakita, T., Horigane, K., Fujii, M., Kobayashi, K., Horie, R., Akimitsu, J., Muraoka, Y., Yokoya, T. & Saini, N. L., Jan 1 2018, In : Physical Chemistry Chemical Physics. 20, 36, p. 23783-23788 6 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Direct observation of double valence-band extrema and anisotropic effective masses of the thermoelectric material SnSe

Nagayama, T., Terashima, K., Wakita, T., Fujiwara, H., Fukura, T., Yano, Y., Ono, K., Kumigashira, H., Ogiso, O., Yamashita, A., Takano, Y., Mori, H., Usui, H., Ochi, M., Kuroki, K., Muraoka, Y. & Yokoya, T., Jan 2018, In : Japanese Journal of Applied Physics. 57, 1, 010301.

Research output: Contribution to journalArticle

9 Citations (Scopus)

Fermi surface topology in a metallic phase of VO2 thin films grown on TiO2(001) substrates

Muraoka, Y., Nagao, H., Yao, Y., Wakita, T., Terashima, K., Yokoya, T., Kumigashira, H. & Oshima, M., Dec 1 2018, In : Scientific reports. 8, 1, 17906.

Research output: Contribution to journalArticle

Metallic phase in stoichiometric CeOBiS 2 revealed by space-resolved ARPES

Sugimoto, T., Paris, E., Wakita, T., Terashima, K., Yokoya, T., Barinov, A., Kajitani, J., Higashinaka, R., Matsuda, T. D., Aoki, Y., Mizokawa, T. & Saini, N. L., Dec 1 2018, In : Scientific reports. 8, 1, 2011.

Research output: Contribution to journalArticle

10 Citations (Scopus)

Multilayer formation via spinodal decomposition in TiO2-VO2 epitaxial films on sapphire substrates

Matsuura, Y., Yoshii, F., Otsuka, T., Kadowaki, K., Ijiri, M., Takemoto, Y., Terashima, K., Wakita, T., Yokoya, T. & Muraoka, Y., Jan 1 2018, (Accepted/In press) In : Journal of the European Ceramic Society.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Origins of Thermal Spin Depolarization in Half-Metallic Ferromagnet CrO2

Fujiwara, H., Terashima, K., Sunagawa, M., Yano, Y., Nagayama, T., Fukura, T., Yoshii, F., Matsuura, Y., Ogata, M., Wakita, T., Yaji, K., Harasawa, A., Kuroda, K., Shin, S., Horiba, K., Kumigashira, H., Muraoka, Y. & Yokoya, T., Dec 18 2018, In : Physical Review Letters. 121, 25, 257201.

Research output: Contribution to journalArticle

4 Citations (Scopus)

Suppression of structural instability in LaOBiS2-xSex by Se substitution

Paris, E., Mizuguchi, Y., Wakita, T., Terashima, K., Yokoya, T., Mizokawa, T. & Saini, N. L., Oct 22 2018, In : Journal of Physics Condensed Matter. 30, 45, 455703.

Research output: Contribution to journalArticle

4 Citations (Scopus)

Temperature-dependent local structure and superconductivity of BaPd2As2 and SrPd2As2

Terashima, K., Paris, E., Simonelli, L., Salas-Colera, E., Puri, A., Wakita, T., Yamada, Y., Nakano, S., Idei, H., Kudo, K., Nohara, M., Muraoka, Y., Mizokawa, T., Yokoya, T. & Saini, N. L., Sep 28 2018, In : Physical Review B. 98, 9, 094525.

Research output: Contribution to journalArticle

1 Citation (Scopus)
2017

Ce 4f electronic states of CeO1-x FxBiS2 studied by soft x-ray photoemission spectroscopy

Wakita, T., Terashima, K., Hamada, T., Fujiwara, H., Minohara, M., Kobayashi, M., Horiba, K., Kumigashira, H., Kutluk, G., Nagao, M., Watauchi, S., Tanaka, I., Demura, S., Okazaki, H., Takano, Y., Mizuguchi, Y., Miura, O., Okada, K., Muraoka, Y. & Yokoya, T., Feb 7 2017, In : Physical Review B. 95, 8, 085109.

Research output: Contribution to journalArticle

4 Citations (Scopus)

Distinct local structure of superconducting Ca10M4As8(Fe2As2)5 (M=Pt,Ir)

Paris, E., Wakita, T., Proux, O., Yokoya, T., Kudo, K., Mitsuoka, D., Kimura, T., Fujimura, K., Nishimoto, N., Ioka, S., Nohara, M., Mizokawa, T. & Saini, N. L., Dec 15 2017, In : Physical Review B. 96, 22, 224507.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Effect of aliovalent dopants on the kinetics of spinodal decomposition in rutile-type TiO2-VO2

Ogata, M., Kadowaki, K., Ijiri, M., Takemoto, Y., Terashima, K., Wakita, T., Yokoya, T. & Muraoka, Y., Aug 1 2017, In : Journal of the European Ceramic Society. 37, 9, p. 3177-3183 7 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Effect of molecular intercalation on the local structure of superconducting Nax(NH3)yMoSe2 system

Simonelli, L., Paris, E., Wakita, T., Marini, C., Terashima, K., Miao, X., Olszewski, W., Ramanan, N., Heinis, D., Kubozono, Y., Yokoya, T. & Saini, N. L., Dec 2017, In : Journal of Physics and Chemistry of Solids. 111, p. 70-74 5 p.

Research output: Contribution to journalArticle

Electronic structure of K-doped picene film on HOPG

Wakita, T., Okazaki, H., Jabuchi, T., Hamada, H., Muraoka, Y. & Yokoya, T., Feb 15 2017, In : Journal of Physics Condensed Matter. 29, 6, 064001.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Electronic structure of self-doped layered Eu3 F4Bi2 S4 material revealed by x-ray absorption spectroscopy and photoelectron spectromicroscopy

Paris, E., Sugimoto, T., Wakita, T., Barinov, A., Terashima, K., Kandyba, V., Proux, O., Kajitani, J., Higashinaka, R., Matsuda, T. D., Aoki, Y., Yokoya, T., Mizokawa, T. & Saini, N. L., Jan 30 2017, In : Physical Review B. 95, 3, 035152.

Research output: Contribution to journalArticle

9 Citations (Scopus)

Evolution of Eu valence and superconductivity in layered Eu0.5La0.5FBiS2-xSex system

Mizuguchi, Y., Paris, E., Wakita, T., Jinno, G., Puri, A., Terashima, K., Joseph, B., Miura, O., Yokoya, T. & Saini, N. L., Feb 27 2017, In : Physical Review B. 95, 6, 064515.

Research output: Contribution to journalArticle

11 Citations (Scopus)

Evolution of the remnant Fermi-surface state in the lightly doped correlated spin-orbit insulator Sr2-xLaxIrO4

Terashima, K., Sunagawa, M., Fujiwara, H., Fukura, T., Fujii, M., Okada, K., Horigane, K., Kobayashi, K., Horie, R., Akimitsu, J., Golias, E., Marchenko, D., Varykhalov, A., Saini, N. L., Wakita, T., Muraoka, Y. & Yokoya, T., Jul 7 2017, In : Physical Review B. 96, 4, 041106.

Research output: Contribution to journalArticle

12 Citations (Scopus)

Inhomogeneous electronic states associated with charge-orbital order/disorder in BaV10O15 probed by photoemission spectromicroscopy

Yoshino, T., Wakita, K., Paris, E., Barinov, A., Kajita, T., Katsufuji, T., Kandyba, V., Sugimoto, T., Yokoya, T., Saini, N. L. & Mizokawa, T., 2017, In : Physical Review B. 96, 11

Research output: Contribution to journalArticle

2 Citations (Scopus)

The electronic structure of Ag1-: XSn1+ xSe2 (x = 0.0, 0.1, 0.2, 0.25 and 1.0)

Wakita, T., Paris, E., Kobayashi, K., Terashima, K., Hacisalihoǧlu, M. Y., Ueno, T., Bondino, F., Magnano, E., Píš, I., Olivi, L., Akimitsu, J., Muraoka, Y., Yokoya, T. & Saini, N. L., 2017, In : Physical Chemistry Chemical Physics. 19, 39, p. 26672-26678 7 p.

Research output: Contribution to journalArticle

7 Citations (Scopus)

Unusual upper critical field behavior in Nb-doped bismuth selenides

Kobayashi, K., Ueno, T., Fujiwara, H., Yokoya, T. & Akimitsu, J., May 16 2017, In : Physical Review B. 95, 18, 180503.

Research output: Contribution to journalArticle

8 Citations (Scopus)
2016

Bulk sensitive angle-resolved photoelectron spectroscopy on Nd(O,F)BiS2

Terashima, K., Sonoyama, J., Sunagawa, M., Fujiwara, H., Nagayama, T., Muro, T., Nagao, M., Watauchi, S., Tanaka, I., Okazaki, H., Takano, Y., Mizuguchi, Y., Usui, H., Suzuki, K., Kuroki, K., Wakita, T., Muraoka, Y. & Yokoya, T., Feb 5 2016, In : Journal of Physics: Conference Series. 683, 1, 012003.

Research output: Contribution to journalConference article

1 Citation (Scopus)

Comparative ARPES studies of LaOxF1-xBiS2 (x = 0.23 and 0.46)

Terashima, K., Wakita, T., Sunagawa, M., Fujiwara, H., Nagayama, T., Ono, K., Kumigashira, H., Nagao, M., Watauchi, S., Tanaka, I., Okazaki, H., Takano, Y., Mizuguchi, Y., Usui, H., Kuroki, K., Muraoka, Y. & Yokoya, T., Feb 5 2016, In : Journal of Physics: Conference Series. 683, 1, 012002.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Determination of the local structure of CsBi4-: XPbxTe6 (x = 0, 0.5) by X-ray absorption spectroscopy

Wakita, T., Paris, E., Mizokawa, T., Hacisalihoǧlu, M. Y., Terashima, K., Okazaki, H., Proux, O., Kieffer, I., Lahera, E., Del Net, W., Olivi, L., Takano, Y., Muraoka, Y., Yokoya, T. & Saini, N. L., 2016, In : Physical Chemistry Chemical Physics. 18, 36, p. 25136-25142 7 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)

Emergence of superconductivity in (NH3)y MxMoSe2 (M: Li, Na and K)

Miao, X., Nishiyama, S., Zheng, L., Goto, H., Eguchi, R., Ota, H., Kambe, T., Terashima, K., Yokoya, T., Nguyen, H. T. L., Kagayama, T., Hirao, N., Ohishi, Y., Ishii, H., Liao, Y. F. & Kubozono, Y., Jul 11 2016, In : Scientific Reports. 6, 29292.

Research output: Contribution to journalArticle

8 Citations (Scopus)

Local electronic state in the half-metallic ferromagnet CrO2 investigated by site-selective Cr 53 NMR measurements

Takeda, H., Shimizu, Y., Kobayashi, Y., Itoh, M., Jin-No, T., Isobe, M., Ueda, Y., Yoshida, S., Muraoka, Y. & Yokoya, T., Jun 15 2016, In : Physical Review B - Condensed Matter and Materials Physics. 93, 23, 235129.

Research output: Contribution to journalArticle

9 Citations (Scopus)

Observation of a hidden hole-like band approaching the fermi level in K-doped iron selenide superconductor

Sunagawa, M., Terashima, K., Hamada, T., Fujiwara, H., Fukura, T., Takeda, A., Tanaka, M., Takeya, H., Takano, Y., Arita, M., Shimada, K., Namatame, H., Taniguchi, M., Suzuki, K., Usui, H., Kuroki, K., Wakita, T., Muraoka, Y. & Yokoya, T., Jul 15 2016, In : Journal of the Physical Society of Japan. 85, 7, 073704.

Research output: Contribution to journalArticle

8 Citations (Scopus)

Observation of intrinsic half-metallic behavior of CrO2 (100) epitaxial films by bulk-sensitive spin-resolved PES

Fujiwara, H., Sunagawa, M., Terashima, K., Kittaka, T., Wakita, T., Muraoka, Y. & Yokoya, T., Aug 5 2016, (Accepted/In press) In : Journal of Electron Spectroscopy and Related Phenomena.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Preparation of TaO2 thin films using NbO2 template layers by a pulsed laser deposition technique

Muraoka, Y., Fujimoto, Y., Kameoka, M., Matsuura, Y., Sunagawa, M., Terashima, K., Wakita, T. & Yokoya, T., Jan 29 2016, In : Thin Solid Films. 599, p. 125-132 8 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Temperature dependent local atomic displacements in ammonia intercalated iron selenide superconductor

Paris, E., Simonelli, L., Wakita, T., Marini, C., Lee, J. H., Olszewski, W., Terashima, K., Kakuto, T., Nishimoto, N., Kimura, T., Kudo, K., Kambe, T., Nohara, M., Yokoya, T. & Saini, N. L., Jun 9 2016, In : Scientific Reports. 6, 27646.

Research output: Contribution to journalArticle

8 Citations (Scopus)
2015

Comparative ARPES study on iron-platinum-arsenide superconductor Ca10(Pt4As8)(Fe2-xPtxAs2)5 (x = 0.25 and 0.42)

Sunagawa, M., Yoshida, R., Ishiga, T., Tsubota, K., Jabuchi, T., Sonoyama, J., Kakiya, S., Mitsuoka, D., Kudo, K., Nohara, M., Ono, K., Kumigashira, H., Oguchi, T., Wakita, T., Muraoka, Y. & Yokoya, T., May 15 2015, In : journal of the physical society of japan. 84, 5, 055001.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Intrinsic spin polarized electronic structure of CrO2 epitaxial film revealed by bulk-sensitive spin-resolved photoemission spectroscopy

Fujiwara, H., Sunagawa, M., Terashima, K., Kittaka, T., Wakita, T., Muraoka, Y. & Yokoya, T., May 18 2015, In : Applied Physics Letters. 106, 20, 202404.

Research output: Contribution to journalArticle

13 Citations (Scopus)

Signature of high T c above 25 K in high quality superconducting diamond

Okazaki, H., Wakita, T., Muro, T., Nakamura, T., Muraoka, Y., Yokoya, T., Kurihara, S. I., Kawarada, H., Oguchi, T. & Takano, Y., Feb 2 2015, In : Applied Physics Letters. 106, 5, 052601.

Research output: Contribution to journalArticle

37 Citations (Scopus)

Superconductivity in aromatic hydrocarbons

Kubozono, Y., Goto, H., Jabuchi, T., Yokoya, T., Kambe, T., Sakai, Y., Izumi, M., Zheng, L., Hamao, S., Nguyen, H. L. T., Sakata, M., Kagayama, T. & Shimizu, K., Jul 15 2015, In : Physica C: Superconductivity and its applications. 514, p. 199-205 7 p.

Research output: Contribution to journalReview article

19 Citations (Scopus)
2014

Characteristic two-dimensional Fermi surface topology of high-Tc iron-based superconductors

Sunagawa, M., Ishiga, T., Tsubota, K., Jabuchi, T., Sonoyama, J., Iba, K., Kudo, K., Nohara, M., Ono, K., Kumigashira, H., Matsushita, T., Arita, M., Shimada, K., Namatame, H., Taniguchi, M., Wakita, T., Muraoka, Y. & Yokoya, T., Mar 14 2014, In : Scientific reports. 4, 4381.

Research output: Contribution to journalArticle

12 Citations (Scopus)

Electronic structures of CeM2Al10 (M = Fe, Ru, and Os) studied by soft X-ray resonant and high-resolution photoemission spectroscopies

Ishiga, T., Wakita, T., Yoshida, R., Okazaki, H., Tsubota, K., Sunagawa, M., Uenaka, K., Okada, K., Kumigashira, H., Oshima, M., Yutani, K., Muro, Y., Takabatake, T., Muraoka, Y. & Yokoya, T., Sep 15 2014, In : journal of the physical society of japan. 83, 9, 094717.

Research output: Contribution to journalArticle

12 Citations (Scopus)

Persistent insulator-to-metal transition of a VO2 thin film induced by soft X-ray irradiation

Muraoka, Y., Nagao, H., Katayama, S., Wakita, T., Hirai, M., Yokoya, T., Kumigashira, H. & Oshima, M., May 2014, In : Japanese Journal of Applied Physics. 53, 5 SPEC. ISSUE 1, 05FB09.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Pressure-dependent magnetization and magnetoresistivity studies on tetragonal FeS (mackinawite): Revealing its intrinsic metallic character

Denholme, S. J., Okazaki, H., Demura, S., Deguchi, K., Fujioka, M., Yamaguchi, T., Takeya, H., Elmassalami, M., Fujiwara, H., Wakita, T., Yokoya, T. & Takano, Y., Oct 1 2014, In : Science and Technology of Advanced Materials. 15, 5, 055007.

Research output: Contribution to journalArticle

15 Citations (Scopus)

Proximity to Fermi-surface topological change in superconducting la O0.54 F0.46Bi S2

Terashima, K., Sonoyama, J., Wakita, T., Sunagawa, M., Ono, K., Kumigashira, H., Muro, T., Nagao, M., Watauchi, S., Tanaka, I., Okazaki, H., Takano, Y., Miura, O., Mizuguchi, Y., Usui, H., Suzuki, K., Kuroki, K., Muraoka, Y. & Yokoya, T., Dec 22 2014, In : Physical Review B - Condensed Matter and Materials Physics. 90, 22, 220512.

Research output: Contribution to journalArticle

23 Citations (Scopus)

Soft x-ray photoemission study of new BiS2-layered superconductor LaO1-xFxBiS2

Nagira, S., Sonoyama, J., Wakita, T., Sunagawa, M., Izumi, Y., Muro, T., Kumigashira, H., Oshima, M., Deguchi, K., Okazaki, H., Takano, Y., Miura, O., Mizuguchi, Y., Suzuki, K., Usui, H., Kuroki, K., Okada, K., Muraoka, Y. & Yokoya, T., Mar 15 2014, In : journal of the physical society of japan. 83, 3, 033703.

Research output: Contribution to journalArticle

21 Citations (Scopus)
2013

Collapsed tetragonal phase transition of Ca(Fe1-xRh x)2As2 studied by photoemission spectroscopy

Tsubota, K., Wakita, T., Nagao, H., Hiramatsu, C., Ishiga, T., Sunagawa, M., Ono, K., Kumigashira, H., Danura, M., Kudo, K., Nohara, M., Muraoka, Y. & Yokoya, T., Jul 1 2013, In : journal of the physical society of japan. 82, 7, 073705.

Research output: Contribution to journalArticle

13 Citations (Scopus)

Evidence for metallic states in potassium-intercalated picene film on graphite

Okazaki, H., Jabuchi, T., Wakita, T., Kato, T., Muraoka, Y. & Yokoya, T., Dec 11 2013, In : Physical Review B - Condensed Matter and Materials Physics. 88, 24, 245414.

Research output: Contribution to journalArticle

15 Citations (Scopus)

Magnetoelectric effect driven by magnetic domain modification in LuFe 2O4

Kambe, T., Fukada, Y., Kano, J., Nagata, T., Okazaki, H., Yokoya, T., Wakimoto, S., Kakurai, K. & Ikeda, N., Mar 14 2013, In : Physical Review Letters. 110, 11, 117602.

Research output: Contribution to journalArticle

21 Citations (Scopus)

Translational Symmetry Breaking and Gapping of Heavy-Quasiparticle Pocket in URu 2 Si 2

Yoshida, R., Tsubota, K., Ishiga, T., Sunagawa, M., Sonoyama, J., Aoki, D., Flouquet, J., Wakita, T., Muraoka, Y. & Yokoya, T., Oct 14 2013, In : Scientific reports. 3, 2750.

Research output: Contribution to journalArticle

15 Citations (Scopus)
2012

Comparative photoemission studies on the superconducting gap of the filled skutterudite superconductors LaPt 4Ge 12 and PrPt 4Ge 12

Nakamura, Y., Okazaki, H., Yoshida, R., Wakita, T., Takeya, H., Hirata, K., Hirai, M., Muraoka, Y. & Yokoya, T., Jul 26 2012, In : Physical Review B - Condensed Matter and Materials Physics. 86, 1, 014521.

Research output: Contribution to journalArticle

19 Citations (Scopus)

Effectiveness of a hot-filament chemical vapor deposition method for preparation of a boron-doped superconducting diamond film with higher superconducting transition temperature

Doi, T., Fukaishi, T., Hiramatsu, C., Wakita, T., Hirai, M., Muraoka, Y., Yokoya, T., Kato, Y., Izumi, Y., Muro, T. & Tamenori, Y., May 1 2012, In : Diamond and Related Materials. 25, p. 5-7 3 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Observation of two fine structures related to the hidden order in the spectral functions of URu 2Si 2

Yoshida, R., Fukui, M., Haga, Y., Yamamoto, E., Onuki, Y., Okawa, M., Malaeb, W., Shin, S., Muraoka, Y. & Yokoya, T., Jun 12 2012, In : Physical Review B - Condensed Matter and Materials Physics. 85, 24, 241102.

Research output: Contribution to journalArticle

13 Citations (Scopus)

Surface physical property of the CrO 2 thin films prepared using a closed chemical vapor deposition method

Muraoka, Y., Yoshida, S., Wakita, T., Hirai, M. & Yokoya, T., Aug 20 2012, Functional Metal Oxide Nanostructures. p. 17-22 6 p. (Materials Research Society Symposium Proceedings; vol. 1406).

Research output: Chapter in Book/Report/Conference proceedingConference contribution