TY - JOUR
T1 - Revisiting the phase diagram of T∗-type La1-x/2Eu1-x/2SrxCuO4using oxygen K-edge X-ray absorption spectroscopy
AU - Asano, Shun
AU - Ishii, Kenji
AU - Yamagami, Kohei
AU - Miyawaki, Jun
AU - Harada, Yoshihisa
AU - Fujita, Masaki
N1 - Funding Information:
The synchrotron radiation experiments were conducted at the BL07LSU of SPring-8 through a joint research in the Synchrotron Radiation Research Organization and the Institute for Solid State Physics, the University of Tokyo (Proposal No. 2019A7593). M.F. is supported by a Grant-in-Aid for Scientific Research (A) (16H02125) and K.I. is supported by a Grant-in-Aid for Scientific Research (B) (16H04004).
Funding Information:
Acknowledgements The synchrotron radiation experiments were conducted at the BL07LSU of SPring-8 through a joint research in the Synchrotron Radiation Research Organization and the Institute for Solid State Physics, the University of Tokyo (Proposal No. 2019A7593). M.F. is supported by a Grant-in-Aid for Scientific Research (A) (16H02125) and K.I. is supported by a Grant-in-Aid for Scientific Research (B) (16H04004).
Publisher Copyright:
© 2020 The Physical Society of Japan.
PY - 2020/7
Y1 - 2020/7
N2 - Oxygen K-edge X-ray absorption spectroscopy measurements were conducted on T∗-type La1-x/2Eu1-x/2SrxCuO4 (LESCO) to estimate the hole density (nh) and investigate the oxidation annealing effect on nh. A drastic increase in nh due to annealing was found. The increase in nh cannot be explained solely by the oxygen gain due to annealing, suggesting that delocalized holes are introduced into the CuO2 plane. A phase diagram of LESCO was redrawn against nh.
AB - Oxygen K-edge X-ray absorption spectroscopy measurements were conducted on T∗-type La1-x/2Eu1-x/2SrxCuO4 (LESCO) to estimate the hole density (nh) and investigate the oxidation annealing effect on nh. A drastic increase in nh due to annealing was found. The increase in nh cannot be explained solely by the oxygen gain due to annealing, suggesting that delocalized holes are introduced into the CuO2 plane. A phase diagram of LESCO was redrawn against nh.
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U2 - 10.7566/JPSJ.89.075002
DO - 10.7566/JPSJ.89.075002
M3 - Article
AN - SCOPUS:85090779372
VL - 89
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 7
M1 - 075002
ER -