2008年7月
Bulk electronic structures and strong electron-phonon interactions in an electron-doped high-temperature superconductor
NEW JOURNAL OF PHYSICS
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- 巻
- 10
- 号
- 開始ページ
- 073005-1-11
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1088/1367-2630/10/7/073005
- 出版者・発行元
- IOP PUBLISHING LTD
We have performed soft x-ray angle-resolved photoemission spectroscopy (ARPES) for the electron-doped high-temperature superconducting cuprates (HTSCs) Nd(2-x)Ce(x)CuO(4) (x = 0.075 and 0.15) in order to disclose their genuine bulk electronic structures. Our soft x-ray ARPES has revealed that the bulk-derived nodal 'kink' (the abrupt change of the electron velocity in quasiparticle dispersions), being absent in the low-energy ARPES, is clearly observable for the electron-doped superconducting Nd(1.85)Ce(0.15)CuO(4). This result confirms that the antiferromagnetic spin correlation is suppressed and the electron-phonon interactions are prevailing in the bulk of the electron-doped superconducting Nd(2-x)Ce(x)CuO(4) at the optimal doping level. The nodal 'kink' behavior is equivalent to that observed in the hole-doped HTSCs. The anisotropic strong electron-phonon interactions seem to be inherent in the HTSCs irrespective of the type of doped carriers.
- リンク情報
- ID情報
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- DOI : 10.1088/1367-2630/10/7/073005
- ISSN : 1367-2630
- Web of Science ID : WOS:000257322100005