Interaction of itinerant electrons and spin fluctuations in electron-doped cuprates

Seung Ryong Park, Takao Morinari, Dong Joon Song, Choon Shik Leem, Chul Kim, Sung Kyun Choi, Kyujin Choi, Jae Hoon Kim, Felix Schmitt, Sung Kwan Mo, Dong Hui Lu, Zhi Xun Shen, Hiroshi Eisaki, Takami Tohyama, Jung Hoon Han, Changyoung Kim

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

We performed angle-resolved photoemission and optical studies on electron-doped high-temperature superconductors (HTSCs), and compared the results with various theoretical models. Based on the fit to the experimental data, we conclude that itinerant electrons in the nonmagnetic phase predominantly couple to the phase fluctuations of the remnant antiferromagnetic (AF) order, rather than to the spin excitations derived from particle-hole pairs. Our observation naturally accounts for the pseudogap phenomenon and other experimental facts in electron-doped HTSCs in terms of the size of the remnant moment and the AF-correlation length. We propose a microscopic model based on the phase fluctuation scenario which leads to a d-wave pairing gap.

Original languageEnglish
Article number174527
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume87
Issue number17
DOIs
Publication statusPublished - 2013 May 31

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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