Electronic structures of CeM2Al10 (M = Fe, Ru, and Os) studied by soft X-ray resonant and high-resolution photoemission spectroscopies

Toshihiko Ishiga, Takanori Wakita, Rikiya Yoshida, Hiroyuki Okazaki, Koji Tsubota, Masanori Sunagawa, Kanta Uenaka, Kozo Okada, Hiroshi Kumigashira, Masaharu Oshima, Keisuke Yutani, Yuji Muro, Toshiro Takabatake, Yuji Muraoka, Takayoshi Yokoya

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

We have performed a photoemission spectroscopy (PES) study of CeM2Al10 ( M = Fe, Ru, and Os) to directly observe the electronic structure involved in the unusual magnetic ordering. Soft X-ray resonant (SXR) PES provides spectroscopic evidence of the hybridization between conduction and Ce 4 f electrons (c-f hybridization) and the order of the hybridization strength (Ru <Os <Fe). High-resolution (HR) PES of CeRu2Al10 and CeOs2Al10 , as compared with that of CeFe2Al10, identi fies two structures that can be ascribed to structures induced by the c-f hybridization and the antiferromagnetic ordering, respectively. Although the c-f hybridization-induced structure is a depletion of the spectral intensity (pseudogap) around the Fermi level (EF) with an energy scale of 20 -30meV, the structure related to the antiferromagnetic ordering is observed as a shoulder at approximately 10 -11 meV within the pseudogap. The energies of the shoulder structures of CeRu2Al10 and CeOs2Al10 are approximately half of the optical gap (20 meV), indicating that EF is located at the midpoint of the gap.

Original languageEnglish
Article number094717
JournalJournal of the Physical Society of Japan
Volume83
Issue number9
DOIs
Publication statusPublished - Sep 15 2014

Fingerprint

photoelectric emission
shoulders
electronic structure
high resolution
spectroscopy
x rays
depletion
conduction
energy
electrons

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Electronic structures of CeM2Al10 (M = Fe, Ru, and Os) studied by soft X-ray resonant and high-resolution photoemission spectroscopies. / Ishiga, Toshihiko; Wakita, Takanori; Yoshida, Rikiya; Okazaki, Hiroyuki; Tsubota, Koji; Sunagawa, Masanori; Uenaka, Kanta; Okada, Kozo; Kumigashira, Hiroshi; Oshima, Masaharu; Yutani, Keisuke; Muro, Yuji; Takabatake, Toshiro; Muraoka, Yuji; Yokoya, Takayoshi.

In: Journal of the Physical Society of Japan, Vol. 83, No. 9, 094717, 15.09.2014.

Research output: Contribution to journalArticle

Ishiga, Toshihiko ; Wakita, Takanori ; Yoshida, Rikiya ; Okazaki, Hiroyuki ; Tsubota, Koji ; Sunagawa, Masanori ; Uenaka, Kanta ; Okada, Kozo ; Kumigashira, Hiroshi ; Oshima, Masaharu ; Yutani, Keisuke ; Muro, Yuji ; Takabatake, Toshiro ; Muraoka, Yuji ; Yokoya, Takayoshi. / Electronic structures of CeM2Al10 (M = Fe, Ru, and Os) studied by soft X-ray resonant and high-resolution photoemission spectroscopies. In: Journal of the Physical Society of Japan. 2014 ; Vol. 83, No. 9.
@article{f6d5fd3681e44806bf7c9f4201d9c553,
title = "Electronic structures of CeM2Al10 (M = Fe, Ru, and Os) studied by soft X-ray resonant and high-resolution photoemission spectroscopies",
abstract = "We have performed a photoemission spectroscopy (PES) study of CeM2Al10 ( M = Fe, Ru, and Os) to directly observe the electronic structure involved in the unusual magnetic ordering. Soft X-ray resonant (SXR) PES provides spectroscopic evidence of the hybridization between conduction and Ce 4 f electrons (c-f hybridization) and the order of the hybridization strength (Ru <Os <Fe). High-resolution (HR) PES of CeRu2Al10 and CeOs2Al10 , as compared with that of CeFe2Al10, identi fies two structures that can be ascribed to structures induced by the c-f hybridization and the antiferromagnetic ordering, respectively. Although the c-f hybridization-induced structure is a depletion of the spectral intensity (pseudogap) around the Fermi level (EF) with an energy scale of 20 -30meV, the structure related to the antiferromagnetic ordering is observed as a shoulder at approximately 10 -11 meV within the pseudogap. The energies of the shoulder structures of CeRu2Al10 and CeOs2Al10 are approximately half of the optical gap (20 meV), indicating that EF is located at the midpoint of the gap.",
author = "Toshihiko Ishiga and Takanori Wakita and Rikiya Yoshida and Hiroyuki Okazaki and Koji Tsubota and Masanori Sunagawa and Kanta Uenaka and Kozo Okada and Hiroshi Kumigashira and Masaharu Oshima and Keisuke Yutani and Yuji Muro and Toshiro Takabatake and Yuji Muraoka and Takayoshi Yokoya",
year = "2014",
month = "9",
day = "15",
doi = "10.7566/JPSJ.83.094717",
language = "English",
volume = "83",
journal = "Journal of the Physical Society of Japan",
issn = "0031-9015",
publisher = "Physical Society of Japan",
number = "9",

}

TY - JOUR

T1 - Electronic structures of CeM2Al10 (M = Fe, Ru, and Os) studied by soft X-ray resonant and high-resolution photoemission spectroscopies

AU - Ishiga, Toshihiko

AU - Wakita, Takanori

AU - Yoshida, Rikiya

AU - Okazaki, Hiroyuki

AU - Tsubota, Koji

AU - Sunagawa, Masanori

AU - Uenaka, Kanta

AU - Okada, Kozo

AU - Kumigashira, Hiroshi

AU - Oshima, Masaharu

AU - Yutani, Keisuke

AU - Muro, Yuji

AU - Takabatake, Toshiro

AU - Muraoka, Yuji

AU - Yokoya, Takayoshi

PY - 2014/9/15

Y1 - 2014/9/15

N2 - We have performed a photoemission spectroscopy (PES) study of CeM2Al10 ( M = Fe, Ru, and Os) to directly observe the electronic structure involved in the unusual magnetic ordering. Soft X-ray resonant (SXR) PES provides spectroscopic evidence of the hybridization between conduction and Ce 4 f electrons (c-f hybridization) and the order of the hybridization strength (Ru <Os <Fe). High-resolution (HR) PES of CeRu2Al10 and CeOs2Al10 , as compared with that of CeFe2Al10, identi fies two structures that can be ascribed to structures induced by the c-f hybridization and the antiferromagnetic ordering, respectively. Although the c-f hybridization-induced structure is a depletion of the spectral intensity (pseudogap) around the Fermi level (EF) with an energy scale of 20 -30meV, the structure related to the antiferromagnetic ordering is observed as a shoulder at approximately 10 -11 meV within the pseudogap. The energies of the shoulder structures of CeRu2Al10 and CeOs2Al10 are approximately half of the optical gap (20 meV), indicating that EF is located at the midpoint of the gap.

AB - We have performed a photoemission spectroscopy (PES) study of CeM2Al10 ( M = Fe, Ru, and Os) to directly observe the electronic structure involved in the unusual magnetic ordering. Soft X-ray resonant (SXR) PES provides spectroscopic evidence of the hybridization between conduction and Ce 4 f electrons (c-f hybridization) and the order of the hybridization strength (Ru <Os <Fe). High-resolution (HR) PES of CeRu2Al10 and CeOs2Al10 , as compared with that of CeFe2Al10, identi fies two structures that can be ascribed to structures induced by the c-f hybridization and the antiferromagnetic ordering, respectively. Although the c-f hybridization-induced structure is a depletion of the spectral intensity (pseudogap) around the Fermi level (EF) with an energy scale of 20 -30meV, the structure related to the antiferromagnetic ordering is observed as a shoulder at approximately 10 -11 meV within the pseudogap. The energies of the shoulder structures of CeRu2Al10 and CeOs2Al10 are approximately half of the optical gap (20 meV), indicating that EF is located at the midpoint of the gap.

UR - http://www.scopus.com/inward/record.url?scp=84922755329&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84922755329&partnerID=8YFLogxK

U2 - 10.7566/JPSJ.83.094717

DO - 10.7566/JPSJ.83.094717

M3 - Article

AN - SCOPUS:84922755329

VL - 83

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

SN - 0031-9015

IS - 9

M1 - 094717

ER -