TY - JOUR
T1 - On-site Coulomb energy versus crystal-field splitting for the insulator-metal transition in La1−xSrxTiO3
AU - Higuchi, T.
AU - Baba, D.
AU - Takeuchi, T.
AU - Tsukamoto, T.
AU - Taguchi, Y.
AU - Tokura, Y.
AU - Chainani, A.
AU - Shin, S.
PY - 2003
Y1 - 2003
N2 - The on-site Coulomb energy (Udd) and crystal-field splitting (10Dq) of doped Mott-insulator La1−xSrxTiO3 have been estimated using resonant soft-x-ray emission spectroscopy (SXES). The Raman scattering of the eg- and t2g-resonant SXES spectra indicate features due to the d − d transitions corresponding to the 10Dq and Udd/2, respectively. The Udd is in accord with the energy separation between the lower and the upper Hubbard bands obtained by photoemission and inverse-photoemission spectra. The Udd does not change much around two metal-insulator transitions at x = 0.05 and 0.95 in La1−xSrxTiO3, while the crystal-field splitting increases as a function of x.
AB - The on-site Coulomb energy (Udd) and crystal-field splitting (10Dq) of doped Mott-insulator La1−xSrxTiO3 have been estimated using resonant soft-x-ray emission spectroscopy (SXES). The Raman scattering of the eg- and t2g-resonant SXES spectra indicate features due to the d − d transitions corresponding to the 10Dq and Udd/2, respectively. The Udd is in accord with the energy separation between the lower and the upper Hubbard bands obtained by photoemission and inverse-photoemission spectra. The Udd does not change much around two metal-insulator transitions at x = 0.05 and 0.95 in La1−xSrxTiO3, while the crystal-field splitting increases as a function of x.
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U2 - 10.1103/PhysRevB.68.104420
DO - 10.1103/PhysRevB.68.104420
M3 - Article
AN - SCOPUS:0142213736
SN - 1098-0121
VL - 68
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 10
ER -