Isotropic Kink and Quasiparticle Excitations in the Three-Dimensional Perovskite Manganite La0.6Sr0.4MnO3

Koji Horiba, Miho Kitamura, Kohei Yoshimatsu, Makoto Minohara, Enju Sakai, Masaki Kobayashi, Atsushi Fujimori, Hiroshi Kumigashira

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

In order to reveal the many-body interactions in three-dimensional perovskite manganites that show colossal magnetoresistance, we performed an in situ angle-resolved photoemission spectroscopy on La0.6Sr0.4MnO3 and investigated the behavior of quasiparticles. We observed quasiparticle peaks near the Fermi momentum in both the electron and the hole bands, and clear kinks throughout the entire hole Fermi surface in the band dispersion. This isotropic behavior of quasiparticles and kinks suggests that polaronic quasiparticles produced by the coupling of electrons with Jahn-Teller phonons play an important role in the colossal magnetoresistance properties of the ferromagnetic metallic phase of three-dimensional manganites.

Original languageEnglish
Article number076401
JournalPhysical review letters
Volume116
Issue number7
DOIs
Publication statusPublished - 2016 Feb 17

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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