k-dependent electronic structure of the colossal magnetoresistive perovskite La0

2020-02-19 04:00:00

energy electronic band dependent Fermi

责任者: Shi, M.;Falub, M.C.;Willmott, P.R.;Krempasky, J.;Herger, R.;Hricovini, K.;Patthey, L. 单位: Paul Scherrer Inst., Villigen, Switzerland 来源出处: Physical Review B (Condensed Matter and Materials Physics)(Phys. Rev., B, Condens, Matter Mater. Phys. (USA)),2004/10/01,70(14):140407-1 摘要: We present the first angle-resolved photoemission spectroscopy (ARPES) results on three-dimensional manganese perovskite La0.66Sr0.34MnO3. In contrast to ARPES results on layered manganites, a finite and k-dependent spectral weight at the Fermi level was observed. We propose a complex energy band to describe the low binding energy electronic states, which may result from the temporally dynamic orbital orientation distributions and/or nanoscale charge inhomogeneities, to account for the anomalously broad ARPES features observed in the measurements. Flat sections of the Fermi surface were determined. A density wave resulting from nesting instabilities induced by the flat Fermi surface sections is manifested by the energy band folding 关键词: band structure;binding energy;colossal magnetoresistance;Fermi level;lanthanum compounds;photoelectron spectra;strontium compounds;k-dependent electronic structure;colossal magnetoresistive perovskite;angle-resolved photoemission spectroscopy;three-dimensional manganese perovskite;layered manganites;k-dependent spectral weight;Fermi level;energy band;binding energy electronic states;dynamic orbital orientation distribution;nanoscale charge inhomogeneities;density wave;energy band folding;La0.66Sr0.34MnO3