TY - JOUR
T1 - Evolution of the Fermi surface in superconductor PrO1-x Fx BiS2 (x=0.0,0.3, and 0.5) revealed by angle-resolved photoemission spectroscopy
AU - Morita, T.
AU - Matsuzawa, Y.
AU - Kumar, S.
AU - Schwier, E. F.
AU - Shimada, K.
AU - Higashinaka, R.
AU - Matsuda, T. D.
AU - Aoki, Y.
AU - Saini, N. L.
AU - Mizokawa, T.
N1 - Funding Information:
The authors acknowledge Prof. Y. Mizuguchi and Prof. Y. Takano for the fruitful discussion and thank T. Asano and T. Nakajima for the sample preparation. The synchrotron radiation experiments were done with the approval of the Hiroshima Synchrotron Radiation Center (Proposal No. 17AG026). We thank the N-BARD, Hiroshima University, for supplying the liquid helium. This work was partially supported by Grants-in-Aid from JSPS (Grants No. 19H01839, No. 19H00659, No. 19K15291) and the CREST program of JST (Grant No. JPMJCR15Q2). N.L.S. was supported by the joint research program of ZAIKEN, Waseda University (Project No. 31010).
Publisher Copyright:
© 2021 American Physical Society.
PY - 2021/3/16
Y1 - 2021/3/16
N2 - We have investigated the electronic structure evolution with F doping in PrO1-xFxBiS2 (x=0.0,0.3,0.5) by means of angle-resolved photoemission spectroscopy. Undoped PrOBiS2 exhibits Fermi surface (FS) pockets around the X point which can be associated with electron doping due to the Pr3+/Pr4+ mixed valence. At x=0.3, the FS pockets are expanded, and their area is almost consistent with the F doping level. Interestingly, horizontal segments facing each other in the rectangular FS pockets lose their spectral weight. The partial suppression of the FS pockets suggests possible anisotropic charge fluctuations around x=0.3. At x=0.5, the FS area is much smaller than the expected value as commonly observed for CeO0.5F0.5BiS2 and NdO0.5F0.5BiS2. In addition, the highly depleted spectral weight at the FS pockets would be consistent with evident charge fluctuations driven by atomic disorder in the BiS2 network.
AB - We have investigated the electronic structure evolution with F doping in PrO1-xFxBiS2 (x=0.0,0.3,0.5) by means of angle-resolved photoemission spectroscopy. Undoped PrOBiS2 exhibits Fermi surface (FS) pockets around the X point which can be associated with electron doping due to the Pr3+/Pr4+ mixed valence. At x=0.3, the FS pockets are expanded, and their area is almost consistent with the F doping level. Interestingly, horizontal segments facing each other in the rectangular FS pockets lose their spectral weight. The partial suppression of the FS pockets suggests possible anisotropic charge fluctuations around x=0.3. At x=0.5, the FS area is much smaller than the expected value as commonly observed for CeO0.5F0.5BiS2 and NdO0.5F0.5BiS2. In addition, the highly depleted spectral weight at the FS pockets would be consistent with evident charge fluctuations driven by atomic disorder in the BiS2 network.
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U2 - 10.1103/PhysRevB.103.094510
DO - 10.1103/PhysRevB.103.094510
M3 - Article
AN - SCOPUS:85103841836
SN - 2469-9950
VL - 103
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
IS - 9
M1 - 094510
ER -