東京大学物性研究所 極限コヒーレント光科学研究センター

岡﨑 研究室

極低温超高分解能レーザーARPESと高次高調波レーザー時間分解ARPES

Publications

2017

[4] Suppression of supercollision carrier cooling in high mobility graphene on SiC(0001)
Takashi Someya, Hirokazu Fukidome, Hiroshi Watanabe, Takashi Yamamoto, Masaru Okada, Hakuto Suzuki, Yu Ogawa, Takushi Iimori, Nobuhisa Ishii, Teruto Kanai, Keiichiro Tashima, Baojie Feng, Susumu Yamamoto, Jiro Itatani, Fumio Komori, Kozo Okazaki, Shik Shin, and Iwao Matsuda
Phys. Rev. B 95, 165303(1-7) (2017). Editors' Suggestion
DOI: 10.1103/PhysRevB.95.165303

[3] Unconventional superconductivity in the BiS2-based layered superconductor NdO0.71F0.29BiS2
Yuichi Ota, Kozo Okazaki, Haruyoshi Q. Yamamoto, Takashi Yamamoto, Shuntaro Watanabe, Chuangtian Chen, Masanori Nagao, Satoshi Watauchi, Isao Tanaka, Yoshihiko Takano, and Shik Shin
Phys. Rev. Lett 118, 167002(1-6) (2017).
DOI: 10.1103/PhysRevLett.118.167002

[2] Ultrafast Melting of Spin DensityWave Order in BaFe2As2 Observed by Time- and Angle-Resolved Photoemission Spectroscopy with Extreme-Ultraviolet Higher Harmonic Generation
H. Suzuki, K. Okazaki, T. Yamamoto, T. Someya, M. Okada, K. Koshiishi, M. Fujisawa, T. Kanai, N. Ishii, M. Nakajima, H. Eisaki, K. Ono, H. Kumigashira, J. Itatani, A. Fujimori and S. Shin
Phys. Rev. B 95, 165112(1-6) (2017).
DOI: 10.1103/PhysRevB.95.165112

[1] Unusual nodal behaviors of the superconducting gap in the iron-based superconductor Ba(Fe0.65Ru0.35)2As2: Effects of spin-orbit coupling
L. Liu, K. Okazaki, T. Yoshida, H. Suzuki, M. Horio, L. C. C. Ambolode II, J. Xu, S. Ideta, M. Hashimoto, D. H. Lu, Z.-X. Shen, Y. Ota, S. Shin, M. Nakajima, S. Ishida, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, T. Mikami, T. Kakeshita, Y. Yamakawa, H. Kontani, S. Uchida, and A. Fujimori
Phys. Rev. B 95, 104504(1-5) (2017).
DOI: 10.1103/PhysRevB.95.104504

2016

[1] Suppression of the antiferromagnetic pseudogap in the electron-doped high-temperature superconductor by "protect annealing"
M. Horio, T. Adachi, Y. Mori, A. Takahashi, T. Yoshida, H. Suzuki, L. C. C. Ambolode II, K. Okazaki, K. Ono, H. Kumigashira, H. Anzai, M. Arita, H. Namatame, M. Taniguchi, D. Ootsuki, K. Sawada, M. Takahashi, T. Mizokawa, Y. Koike, and A. Fujimori
Nat. Commun. 7, 10567(1-8) (2016).
DOI: 10.1038/ncomms10567

2015

[5] Nonequilibrium electronic and phonon dynamics of Cu0.17Bi2Se3 investigated by core-level and valence-band time-resolved photoemission spectroscopy
T. Yamamoto, Y. Ishida, R. Yoshida, M. Okawa, K. Okazaki, T. Kanai, A. Kikkawa, Y. Taguchi, T. Kiss, K. Ishizaka, N. Ishii, J. Itatani, S. Watanabe, Y. Tokura, T. Saitoh, and S. Shin
Phys. Rev. B 92, 121106(R).
DOI: 10.1103/PhysRevB.92.121106

[4] In-plane electronic anisotropy in the antiferromagnetic-orthorhombic phase of isovalent-substituted Ba(Fe1−xRux)2As2
L. Liu, T. Mikami, S. Ishida, K. Koshiishi, K. Okazaki, T. Yoshida, H. Suzuki, M. Horio, L. C. C. Ambolode II, J. Xu, H. Kumigashira, K. Ono, M. Nakajima, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, T. Kakeshita, S. Uchida, and A. Fujimori,
Phys. Rev. B 92, 094503 (2015)
DOI: 10.1103/PhysRevB.92.094503

[3] Low-Temperature and High-Energy-Resolution Laser Photoemission Spectroscopy
Takahiro Shimojima, Kozo Okazaki, and Shik Shin
J. Phys. Soc. Jpn. 84, 072001 (2015) (Invited Review Paper).
DOI: 10.7566/JPSJ.84.072001

[2] Dependence of electron correlation strength in Fe1+yTe1-xSex on Se content
L. C. C. Ambolode II, K. Okazaki, M. Horio, H. Suzuki, L. Liu, S. Ideta, T. Yoshida, T. Mikami, T. Kakeshita, S. Uchida, K. Ono, H. Kumigashira, M. Hashimoto, D. -H. Lu, Z. -X. Shen, and A. Fujimori,
Phys. Rev. B 92, 035104 (2015).
DOI: 10.1103/PhysRevB.92.035104

[1] Reversed anisotropy of the in-plane resistivity in the antiferromagnetic phase of iron tellurides
L. Liu, T. Mikami, M. Takahashi, S. Ishida, T. Kakeshita, K. Okazaki, A. Fujimori, and S. Uchida,
Phys. Rev. B 91, 134502 (2015).
DOI: 10.1103/PhysRevB.91.134502

2014

[5] Evidence of a universal relation between electron-mode coupling and Tc in Ba1−xKxFe2As2 superconductor from laser angle-resolved photoemission spectroscopy
W. Malaeb, T. Shimojima, Y. Ishida, T. Kondo, K. Okazaki, Y. Ota, K. Ohgushi, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, S. Ishida, M. Nakajima, S. Uchida, H. Fukazawa, T. Saito, Y. Kohori, and S. Shin
Phys. Rev. B 90, 195124(1-6) (2014).
DOI: 10.1103/PhysRevB.90.195124

[4] Strongly three-dimensional electronic structure and Fermi surfaces of SrFe2(As0.65P0.35)2: Comparison with BaFe2(As1-xPx)2
H. Suzuki, T. Kobayashi, S. Miyasaka, T. Yoshida, K. Okazaki, L. C. C. Ambolode, II, S. Ideta, M. Yi, M. Hashimoto, D. H. Lu, Z.-X. Shen, K. Ono, H. Kumigashira, S. Tajima, and A. Fujimori
Phys. Rev. B 89, 184513 (2014).
DOI: 10.1103/PhysRevB.89.184513

[3] Evidence for excluding the possibility of d-wave superconducting-gap symmetry in Ba-doped KFe2As2
Y. Ota, K. Okazaki, Y. Kotani, T. Shimojima, W. Malaeb, S. Watanabe, C.-T. Chen, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, T. Saito, H. Fukazawa, Y. Kohori, and S. Shin
Phys. Rev. B 89, 081103 (2014).
DOI: 10.1103/PhysRevB.89.081103

[2] Superconductivity in an electron band just above the Fermi level: possible route to BCS-BEC superconductivity
K. Okazaki, Y. Ito, Y. Ota, Y. Kotani, T. Shimojima, T. Kiss, S. Watanabe, C.-T. Chen, S. Niitaka, T. Hanaguri, H. Takagi, A. Chainani, and S. Shin
Sci. Rep. 4, 4109 (2014).
DOI: 10.1038/srep04109

[1] Stripe-Induced High-Temperature Superconductivity in Cuprates
S. Sugai, Y. Takayanagi and J. Nohara, R. Shiozaki, N. Hayamizu, T. Muroi, T. Hosokawa, H. Suzuki, Y. Sone, H. Mabuchi, K. Takenaka, K. Okazaki
J. Supercond. Nov. Magn. 27, 941 (2014).