Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1998-01-12
Physics
Condensed Matter
Strongly Correlated Electrons
12 pages in a Phys. Rev. B camera-ready format with 16 EPS figures embedded. LaTeX 2.09 source file using "camera.sty" and "pr
Scientific paper
10.1103/PhysRevB.58.4384
Optical conductivity spectra of single crystals of Ca_1-xSr_xVO_3 have been studied to elucidate how the electronic behavior depends on the strength of the electron correlation without changing the nominal number of electrons per vanadium atom. The effective mass deduced by the analysis of the Drude-like contribution do not show critical enhancement, even though the system is close to the Mott transition. Besides the Drude-like contribution, two anomalous features were observed in the optical conductivity spectra of the intraband transition within the 3d band. These features can be assigned to transitions involving the incoherent and coherent bands near the Fermi level. The large spectral weight redistribution in this system, however, does not involve a large mass enhancement.
Aiura Yoshihiro
Hase Izumi
Inoue Isao H.
Makino Hiroki
Onari Seiichiro
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