TY - JOUR
T1 - Isotropic Kink and Quasiparticle Excitations in the Three-Dimensional Perovskite Manganite La0.6Sr0.4MnO3
AU - Horiba, Koji
AU - Kitamura, Miho
AU - Yoshimatsu, Kohei
AU - Minohara, Makoto
AU - Sakai, Enju
AU - Kobayashi, Masaki
AU - Fujimori, Atsushi
AU - Kumigashira, Hiroshi
N1 - Publisher Copyright:
© 2016 American Physical Society.
PY - 2016/2/17
Y1 - 2016/2/17
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.116.076401
DO - 10.1103/PhysRevLett.116.076401
M3 - Article
AN - SCOPUS:84959377921
VL - 116
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 7
M1 - 076401
ER -