TY - JOUR
T1 - Systematic change of spectral function observed by controlling electron correlation in Ca1-xSrxVO3 with fixed 3d1 configuration.
AU - Inoue, I. H.
AU - Hase, I.
AU - Aiura, Y.
AU - Fujimori, A.
AU - Morikawa, K.
AU - Mizokawa, T.
AU - Haruyama, Y.
AU - Maruyama, T.
AU - Nishihara, Y.
PY - 1994/12
Y1 - 1994/12
N2 - By using ultra-violet photoemission spectroscopy (UPS) and soft x-ray absorption spectroscopy (XAS), we have observed a systematic change of the spectral function around the Fermi level in the perovskite-type conductive 3d1 system, Ca1-xSrxVO3. When we decrease the Sr concentration (x) from 1 to 0 in Ca1-xSrxVO3, UPS and XAS intensities near the Fermi level decrease, and the reduced spectral weight is transferred to high energy part about 2 eV below and above Fermi level. The high energy features are thought to correspond to the remnants of lower and upper Hubbard bands, and the spectral weight within ∼1eV of Fermi level is assigned to the quasiparticle excitations or renormalized 3d-band. That is, the observed systematic spectral change indicates the opening of Mott-Hubbard gap.
AB - By using ultra-violet photoemission spectroscopy (UPS) and soft x-ray absorption spectroscopy (XAS), we have observed a systematic change of the spectral function around the Fermi level in the perovskite-type conductive 3d1 system, Ca1-xSrxVO3. When we decrease the Sr concentration (x) from 1 to 0 in Ca1-xSrxVO3, UPS and XAS intensities near the Fermi level decrease, and the reduced spectral weight is transferred to high energy part about 2 eV below and above Fermi level. The high energy features are thought to correspond to the remnants of lower and upper Hubbard bands, and the spectral weight within ∼1eV of Fermi level is assigned to the quasiparticle excitations or renormalized 3d-band. That is, the observed systematic spectral change indicates the opening of Mott-Hubbard gap.
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U2 - 10.1016/0921-4534(94)91728-0
DO - 10.1016/0921-4534(94)91728-0
M3 - Article
AN - SCOPUS:1542531459
SN - 0921-4534
VL - 235-240
SP - 1007
EP - 1008
JO - Physica C: Superconductivity and its applications
JF - Physica C: Superconductivity and its applications
IS - PART 2
ER -