Antiphase fermi-surface modulations accompanying displacement excitation in a parent compound of iron-based superconductors

Kozo Okazaki; Hakuto Suzuki; Takeshi Suzuki; Takashi Yamamoto; Takashi Someya; Yu Ogawa; Masaru Okada; Masami Fujisawa; Teruto Kanai; Nobuhisa Ishii; Jiro Itatani; Masamichi Nakajima; Hiroshi Eisaki; Atsushi Fujimori; Shik Shin

doi:10.1103/PhysRevB.97.121107

Antiphase fermi-surface modulations accompanying displacement excitation in a parent compound of iron-based superconductors

Kozo Okazaki, Hakuto Suzuki, Takeshi Suzuki, Takashi Yamamoto, Takashi Someya, Yu Ogawa, Masaru Okada, Masami Fujisawa, Teruto Kanai, Nobuhisa Ishii, Jiro Itatani, Masamichi Nakajima, Hiroshi Eisaki, Atsushi Fujimori, Shik Shin

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

We investigate the transient electronic structure of BaFe2As2, a parent compound of iron-based superconductors, by time-and angle-resolved photoemission spectroscopy. In order to probe the entire Brillouin zone, we utilize extreme ultraviolet photons and observe photoemission intensity oscillation with the frequency of the A1g phonon which is antiphase between the zone-centered hole Fermi surfaces (FSs) and zone-cornered electron FSs. We attribute the antiphase behavior to the warping in one of the zone-centered hole FSs accompanying the displacement of the pnictogen height and find that this displacement is the same direction as that induced by substitution of P for As, where superconductivity is induced by a structural modification without carrier doping in this system.

Original language	English
Article number	121107
Journal	Physical Review B
Volume	97
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevB.97.121107
Publication status	Published - 2018 Mar 13
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.97.121107

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Okazaki, K., Suzuki, H., Suzuki, T., Yamamoto, T., Someya, T., Ogawa, Y., Okada, M., Fujisawa, M., Kanai, T., Ishii, N., Itatani, J., Nakajima, M., Eisaki, H., Fujimori, A., & Shin, S. (2018). Antiphase fermi-surface modulations accompanying displacement excitation in a parent compound of iron-based superconductors. Physical Review B, 97(12), [121107]. https://doi.org/10.1103/PhysRevB.97.121107

Okazaki, K, Suzuki, H, Suzuki, T, Yamamoto, T, Someya, T, Ogawa, Y, Okada, M, Fujisawa, M, Kanai, T, Ishii, N, Itatani, J, Nakajima, M, Eisaki, H, Fujimori, A & Shin, S 2018, 'Antiphase fermi-surface modulations accompanying displacement excitation in a parent compound of iron-based superconductors', Physical Review B, vol. 97, no. 12, 121107. https://doi.org/10.1103/PhysRevB.97.121107

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title = "Antiphase fermi-surface modulations accompanying displacement excitation in a parent compound of iron-based superconductors",

abstract = "We investigate the transient electronic structure of BaFe2As2, a parent compound of iron-based superconductors, by time-and angle-resolved photoemission spectroscopy. In order to probe the entire Brillouin zone, we utilize extreme ultraviolet photons and observe photoemission intensity oscillation with the frequency of the A1g phonon which is antiphase between the zone-centered hole Fermi surfaces (FSs) and zone-cornered electron FSs. We attribute the antiphase behavior to the warping in one of the zone-centered hole FSs accompanying the displacement of the pnictogen height and find that this displacement is the same direction as that induced by substitution of P for As, where superconductivity is induced by a structural modification without carrier doping in this system.",

author = "Kozo Okazaki and Hakuto Suzuki and Takeshi Suzuki and Takashi Yamamoto and Takashi Someya and Yu Ogawa and Masaru Okada and Masami Fujisawa and Teruto Kanai and Nobuhisa Ishii and Jiro Itatani and Masamichi Nakajima and Hiroshi Eisaki and Atsushi Fujimori and Shik Shin",

note = "Funding Information: We would like to thank T. Tohyama and M. Imada for valuable discussions and comments and T. Yoshida for valuable comments. This work was supported by JSPS KAKENHI (Grants No. JP25220707 and No. JP26610095) and Photon and Quantum Basic Research Coordinated Development Program from the Ministry of Education, Culture, Sports, Science and Technology, Japan. H.S., T.S., and M.O. acknowledge the JSPS Research Fellowship for Young Scientists, and H.S. acknowledges Advanced Leading Graduate Course for Photon Science (ALPS) for financial supports. Publisher Copyright: {\textcopyright} 2018 American Physical Society.",

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doi = "10.1103/PhysRevB.97.121107",

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AU - Okazaki, Kozo

AU - Suzuki, Hakuto

AU - Suzuki, Takeshi

AU - Yamamoto, Takashi

AU - Someya, Takashi

AU - Ogawa, Yu

AU - Okada, Masaru

AU - Fujisawa, Masami

AU - Kanai, Teruto

AU - Ishii, Nobuhisa

AU - Itatani, Jiro

AU - Nakajima, Masamichi

AU - Eisaki, Hiroshi

AU - Fujimori, Atsushi

AU - Shin, Shik

N1 - Funding Information: We would like to thank T. Tohyama and M. Imada for valuable discussions and comments and T. Yoshida for valuable comments. This work was supported by JSPS KAKENHI (Grants No. JP25220707 and No. JP26610095) and Photon and Quantum Basic Research Coordinated Development Program from the Ministry of Education, Culture, Sports, Science and Technology, Japan. H.S., T.S., and M.O. acknowledge the JSPS Research Fellowship for Young Scientists, and H.S. acknowledges Advanced Leading Graduate Course for Photon Science (ALPS) for financial supports. Publisher Copyright: © 2018 American Physical Society.

PY - 2018/3/13

Y1 - 2018/3/13

N2 - We investigate the transient electronic structure of BaFe2As2, a parent compound of iron-based superconductors, by time-and angle-resolved photoemission spectroscopy. In order to probe the entire Brillouin zone, we utilize extreme ultraviolet photons and observe photoemission intensity oscillation with the frequency of the A1g phonon which is antiphase between the zone-centered hole Fermi surfaces (FSs) and zone-cornered electron FSs. We attribute the antiphase behavior to the warping in one of the zone-centered hole FSs accompanying the displacement of the pnictogen height and find that this displacement is the same direction as that induced by substitution of P for As, where superconductivity is induced by a structural modification without carrier doping in this system.

AB - We investigate the transient electronic structure of BaFe2As2, a parent compound of iron-based superconductors, by time-and angle-resolved photoemission spectroscopy. In order to probe the entire Brillouin zone, we utilize extreme ultraviolet photons and observe photoemission intensity oscillation with the frequency of the A1g phonon which is antiphase between the zone-centered hole Fermi surfaces (FSs) and zone-cornered electron FSs. We attribute the antiphase behavior to the warping in one of the zone-centered hole FSs accompanying the displacement of the pnictogen height and find that this displacement is the same direction as that induced by substitution of P for As, where superconductivity is induced by a structural modification without carrier doping in this system.

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Antiphase fermi-surface modulations accompanying displacement excitation in a parent compound of iron-based superconductors

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