Impurity effects on electron-mode coupling in high-temperature superconductors

Kensei Terashima, H. Matsui, D. Hashimoto, T. Sato, T. Takahashi, H. Ding, T. Yamamoto, K. Kadowaki

Research output: Contribution to journalArticle

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Abstract

Despite years of intensive research on copper oxide superconductors with high transition temperatures (Tc), the driving force of superconductivity has not yet been clarified. Angle-resolved photoemission spectroscopy (ARPES) 1-3 measurements have uncovered an important contribution of lattice vibrations (phonons) to superconductivity, sparking a fierce debate on the nature of the 'glue' - phonons or magnetic excitations - binding together the superconducting Cooper pairs1-11. However, it is difficult to distinguish these two pairing forces owing to their similar energy scales. Here, we propose a fresh approach to investigate the origin of many-body interactions in these superconductors: an impurity-substitution effect on the low-energy dynamics, which is a magnetic analogue of the isotope effect used for classical superconductors. Our ARPES results reveal that the impurity-induced changes in the electron self-energy show a good correspondence to those of magnetic excitations12-18, indicating the importance of spin fluctuations to electron pairing in the high-Tc superconductors.

Original languageEnglish
Pages (from-to)27-31
Number of pages5
JournalNature Physics
Volume2
Issue number1
DOIs
Publication statusPublished - Jan 15 2006
Externally publishedYes

Fingerprint

high temperature superconductors
coupled modes
impurities
phonons
electrons
photoelectric emission
superconductivity
glues
lattice vibrations
copper oxides
isotope effect
spectroscopy
energy
transition temperature
substitutes
analogs
excitation
interactions

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Terashima, K., Matsui, H., Hashimoto, D., Sato, T., Takahashi, T., Ding, H., ... Kadowaki, K. (2006). Impurity effects on electron-mode coupling in high-temperature superconductors. Nature Physics, 2(1), 27-31. https://doi.org/10.1038/nphys200

Impurity effects on electron-mode coupling in high-temperature superconductors. / Terashima, Kensei; Matsui, H.; Hashimoto, D.; Sato, T.; Takahashi, T.; Ding, H.; Yamamoto, T.; Kadowaki, K.

In: Nature Physics, Vol. 2, No. 1, 15.01.2006, p. 27-31.

Research output: Contribution to journalArticle

Terashima, K, Matsui, H, Hashimoto, D, Sato, T, Takahashi, T, Ding, H, Yamamoto, T & Kadowaki, K 2006, 'Impurity effects on electron-mode coupling in high-temperature superconductors', Nature Physics, vol. 2, no. 1, pp. 27-31. https://doi.org/10.1038/nphys200
Terashima, Kensei ; Matsui, H. ; Hashimoto, D. ; Sato, T. ; Takahashi, T. ; Ding, H. ; Yamamoto, T. ; Kadowaki, K. / Impurity effects on electron-mode coupling in high-temperature superconductors. In: Nature Physics. 2006 ; Vol. 2, No. 1. pp. 27-31.
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