Electronic structure of superconducting and non-superconducting Pr 2Ba4Cu7O15-δ revealed by photoemission spectroscopy

Yuki Wakisaka, Kou Takubo, Takaaki Sudayama, Jin Young Son, Takashi Mizokawa, Masashi Arita, Hirofumi Namatame, Masaki Taniguchi, Syun Sekiya, Kazunori Fukuda, Fumihiro Ishikawa, Yuh Yamada

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In order to understand the nature of chain-driven superconductivity in Pr2Ba4Cu7O15-δ (Pr247), we have studied the electronic structure of as-sintered non-superconducting Pr247 and annealed superconducting Pr247 samples using photoemission spectroscopy. The O 1s, Ba 3d, Pr 4d, and Cu 2p core-level energy shifts by annealing indicate that electrons doped by the annealing mainly fill the localized Fehrenbacher-Rice (FR) state. The photoemission spectra ρ(ω) near the Fermi level (EF) are derived from the metallic Cu-O double chain and can be fitted to the power-law function plus step function Aω α + Bθ(ω). ρ(ω) near EF is indistinguishable between the as-sintered and annealed Pr247 and the exponent α is ∼1.5. These results indicate that the Cu-O double chain provides the spectral weight near EF and that the annealing affects the localized FR state instead of the near-EF state.

Original languageEnglish
Article number074710
JournalJournal of the Physical Society of Japan
Volume77
Issue number7
DOIs
Publication statusPublished - 2008 Jul
Externally publishedYes

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photoelectric emission
rice
electronic structure
annealing
spectroscopy
step functions
superconductivity
energy levels
exponents
shift
electrons

Keywords

  • Cu-O double chain
  • Photoemission spectroscopy
  • Superconductivity

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Electronic structure of superconducting and non-superconducting Pr 2Ba4Cu7O15-δ revealed by photoemission spectroscopy. / Wakisaka, Yuki; Takubo, Kou; Sudayama, Takaaki; Son, Jin Young; Mizokawa, Takashi; Arita, Masashi; Namatame, Hirofumi; Taniguchi, Masaki; Sekiya, Syun; Fukuda, Kazunori; Ishikawa, Fumihiro; Yamada, Yuh.

In: Journal of the Physical Society of Japan, Vol. 77, No. 7, 074710, 07.2008.

Research output: Contribution to journalArticle

Wakisaka, Y, Takubo, K, Sudayama, T, Son, JY, Mizokawa, T, Arita, M, Namatame, H, Taniguchi, M, Sekiya, S, Fukuda, K, Ishikawa, F & Yamada, Y 2008, 'Electronic structure of superconducting and non-superconducting Pr 2Ba4Cu7O15-δ revealed by photoemission spectroscopy', Journal of the Physical Society of Japan, vol. 77, no. 7, 074710. https://doi.org/10.1143/JPSJ.77.074710
Wakisaka, Yuki ; Takubo, Kou ; Sudayama, Takaaki ; Son, Jin Young ; Mizokawa, Takashi ; Arita, Masashi ; Namatame, Hirofumi ; Taniguchi, Masaki ; Sekiya, Syun ; Fukuda, Kazunori ; Ishikawa, Fumihiro ; Yamada, Yuh. / Electronic structure of superconducting and non-superconducting Pr 2Ba4Cu7O15-δ revealed by photoemission spectroscopy. In: Journal of the Physical Society of Japan. 2008 ; Vol. 77, No. 7.
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