We have studied the multi-band electronic structure of ferromagnetic CeRuPO (T-C = 15K) 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 (E-F). Around the zone corner, two electron bands are observed and cross E-F. 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 3z(2) - r(2) character is strongly renormalized indicating correlation effect due to hybridization with the Ce 4f orbitals. The Ru 4d 3z(2) - r(2) band changes across T-C suggesting that the out-of-plane 3z(2) - r(2) orbital channel plays essential roles in the ferromagnetism.
Multi-band electronic structure of ferromagnetic CeRuPO / Takahashi, Masaya; Ootsuki, Daiki; Horio, Masafumi; Arita, Masashi; Namatame, Hirofumi; Taniguchi, Masaki; Saini, Naurang L.; Sugawara, Hitoshi; Mizokawa, Takashi. - In: JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN. - ISSN 0031-9015. - 87:4(2018), p. 043703. [10.7566/JPSJ.87.043703]
Multi-band electronic structure of ferromagnetic CeRuPO
Saini, Naurang L.;
2018
Abstract
We have studied the multi-band electronic structure of ferromagnetic CeRuPO (T-C = 15K) 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 (E-F). Around the zone corner, two electron bands are observed and cross E-F. 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 3z(2) - r(2) character is strongly renormalized indicating correlation effect due to hybridization with the Ce 4f orbitals. The Ru 4d 3z(2) - r(2) band changes across T-C suggesting that the out-of-plane 3z(2) - r(2) orbital channel plays essential roles in the ferromagnetism.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
