TY - JOUR
T1 - ARPES studies of the inverse perovskite Ca3PbO
T2 - Experimental confirmation of a candidate 3D Dirac fermion system
AU - Obata, Yukiko
AU - Yukawa, Ryu
AU - Horiba, Koji
AU - Kumigashira, Hiroshi
AU - Toda, Yoshitake
AU - Matsuishi, Satoru
AU - Hosono, Hideo
N1 - Funding Information:
We thank J. Yamaura, M. Kobayashi, M. Minohara, M. Kitamura, and T. Mitsuhashi for help with the SX-ARPES measurements at KEK-PF. Also, we thank Professor D. C. Fredrickson of University of Wisconsin for reading the manuscript. This work was supported by the Ministry of Education, Culture, Sports, Science and Technology Element Strategy Initiative to Form Core Research Center. The work at KEK-PF was performed under the approval of the Program Advisory Committee (Proposal 2016S2-004) at the Institute of Materials Structure Science, KEK.
Publisher Copyright:
© 2017 American Physical Society.
PY - 2017/10/9
Y1 - 2017/10/9
N2 - We investigate the band structure of the inverse perovskite Ca3PbO, a candidate three-dimensional (3D) Dirac fermion material, through soft x-ray angle-resolved photoemission spectroscopy. Conelike band dispersions are observed for Ca3PbO, in close agreement with the predictions of electronic structure calculations. We further demonstrate that chemical substitution of Bi for Pb is effective in tuning the Fermi level of Ca3PbO while leaving its electronic structure intact. Our study confirms that the inverse perovskite family provides a promising platform for the exploration of 3D Dirac fermion systems.
AB - We investigate the band structure of the inverse perovskite Ca3PbO, a candidate three-dimensional (3D) Dirac fermion material, through soft x-ray angle-resolved photoemission spectroscopy. Conelike band dispersions are observed for Ca3PbO, in close agreement with the predictions of electronic structure calculations. We further demonstrate that chemical substitution of Bi for Pb is effective in tuning the Fermi level of Ca3PbO while leaving its electronic structure intact. Our study confirms that the inverse perovskite family provides a promising platform for the exploration of 3D Dirac fermion systems.
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U2 - 10.1103/PhysRevB.96.155109
DO - 10.1103/PhysRevB.96.155109
M3 - Article
AN - SCOPUS:85037683135
VL - 96
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 15
M1 - 155109
ER -