TY - JOUR
T1 - Observation of a pseudogap in the vicinity of the metal–insulator transition in the perovskite-type vanadium oxides Nd1−xSrxVO3
AU - Yamamoto, Shintaro
AU - Ootsuki, Daiki
AU - Shimonaka, Daiya
AU - Shibata, Daisuke
AU - Kodera, Kenjiro
AU - Okawa, Mario
AU - Saitoh, Tomohiko
AU - Horio, Masafumi
AU - Fujimori, Atsushi
AU - Kumigashira, Hiroshi
AU - Ono, Kanta
AU - Ikenaga, Eiji
AU - Miyasaka, Shigeki
AU - Tajima, Setsuko
AU - Yoshida, Teppei
N1 - Funding Information:
Acknowledgements We are grateful to H. Wadati for the experimental support in the synchrotron radiation facility. This work was supported by a Grant-in-Aid for Scientific Research (C) (16K05445) and the Murata Science Foundation. The experiments with synchrotron radiation were carried out under the approval of SPring-8 Japan Synchrotron Radiation Research Institute (Proposal Nos. 2013A1700, 2013B1782, and 2015A1602) and Photon Factory Program Advisory Committee (Proposal Nos. 2012S2-001, 2013G218, 2015G144, and 2015S2-003).
Funding Information:
We are grateful to H. Wadati for the experimental support in the synchrotron radiation facility. This work was supported by a Grant-in-Aid for Scientific Research (C) (16K05445) and the Murata Science Foundation. The experiments with synchrotron radiation were carried out under the approval of SPring-8 Japan Synchrotron Radiation Research Institute (Proposal Nos. 2013A1700, 2013B1782, and 2015A1602) and Photon Factory Program Advisory Committee (Proposal Nos. 2012S2-001, 2013G218, 2015G144, and 2015S2-003).
Publisher Copyright:
© 2018 The Physical Society of Japan.
PY - 2018
Y1 - 2018
N2 - We have performed a photoemission study of the Mott–Hubbard system Nd1−xSrxVO3 (x = 0.20 and 0.30) to investigate the electronic structure in the vicinity of the metal–insulator transition. By using bulk sensitive hard X-ray photoemission spectroscopy, we have observed a large coherent spectral weight near the Fermi level compared to those observed with surface-sensitive low photons. In particular, a pseudogap with an energy of ~0.2 eV has been observed near the Fermi level, which is consistent with a prediction with a dynamical cluster approximation calculation. In order to understand the characteristic features in the Mott–Hubbard-type metal–insulator transition, particularly the pseudogap opening at x = 0.2 and 0.3, a phenomenological model of the self-energy has been proposed.
AB - We have performed a photoemission study of the Mott–Hubbard system Nd1−xSrxVO3 (x = 0.20 and 0.30) to investigate the electronic structure in the vicinity of the metal–insulator transition. By using bulk sensitive hard X-ray photoemission spectroscopy, we have observed a large coherent spectral weight near the Fermi level compared to those observed with surface-sensitive low photons. In particular, a pseudogap with an energy of ~0.2 eV has been observed near the Fermi level, which is consistent with a prediction with a dynamical cluster approximation calculation. In order to understand the characteristic features in the Mott–Hubbard-type metal–insulator transition, particularly the pseudogap opening at x = 0.2 and 0.3, a phenomenological model of the self-energy has been proposed.
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U2 - 10.7566/JPSJ.87.024708
DO - 10.7566/JPSJ.87.024708
M3 - Article
AN - SCOPUS:85040764310
SN - 0031-9015
VL - 87
JO - journal of the physical society of japan
JF - journal of the physical society of japan
IS - 2
M1 - 024708
ER -