TY - JOUR
T1 - Multi-band electronic structure of ferromagnetic CeRuPO
AU - Takahashi, Masaya
AU - Ootsuki, Daiki
AU - Horio, Masafumi
AU - Arita, Masashi
AU - Namatame, Hirofumi
AU - Taniguchi, Masaki
AU - Saini, Naurang L.
AU - Sugawara, Hitoshi
AU - Mizokawa, Takashi
N1 - Funding Information:
Acknowledgements The authors would like to thank Professor H. Kotegawa for the informative discussion. T.M. would like to acknowledge hospitality at the Sapienza University of Rome. D.O. and M.H. acknowledge support from the JSPS Research Fellowship for Young Scientists. The synchrotron radiation experiment was performed with the approval of Hiroshima Synchrotron Radiation Center (Proposals 15-A-5 and 16-A-10).
Publisher Copyright:
© 2018 The Physical Society of Japan.
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2018
Y1 - 2018
N2 - 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.
AB - 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.
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U2 - 10.7566/JPSJ.87.043703
DO - 10.7566/JPSJ.87.043703
M3 - Article
AN - SCOPUS:85044306115
SN - 0031-9015
VL - 87
JO - journal of the physical society of japan
JF - journal of the physical society of japan
IS - 4
M1 - 043703
ER -