Multi-band electronic structure of ferromagnetic CeRuPO

Masaya Takahashi, Daiki Ootsuki, Masafumi Horio, Masashi Arita, Hirofumi Namatame, Masaki Taniguchi, Naurang L. Saini, Hitoshi Sugawara, Takashi Mizokawa

    Research output: Contribution to journalArticle

    Abstract

    We have studied the multi-band electronic structure of ferromagnetic CeRuPO (TC = 15 K) by means of angle-resolved photoemission spectroscopy (ARPES). The ARPES results show that three hole bands exist around the zone center and two of them cross the Fermi level (EF). Around the zone corner, two electron bands are observed and cross EF. These hole and electron bands, which can be assigned to the Ru 4d bands, are basically consistent with the band-structure calculation including their orbital characters. However, one of the electron bands with Ru 4d 3z2 − r2 character is strongly renormalized indicating correlation effect due to hybridization with the Ce 4 f orbitals. The Ru 4d 3z2 − r2 band changes across TC suggesting that the out-of-plane 3z2 − r2 orbital channel plays essential roles in the ferromagnetism.

    Original languageEnglish
    Article number043703
    JournalJournal of the Physical Society of Japan
    Volume87
    Issue number4
    DOIs
    Publication statusPublished - 2018 Jan 1

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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