SYSTEMATIC DEVELOPMENT OF THE SPECTRAL-FUNCTION IN THE 3D(1) MOTT-HUBBARD SYSTEM CA1-XSRXVO3
SYSTEMATIC DEVELOPMENT OF THE SPECTRAL-FUNCTION IN THE 3D(1) MOTT-HUBBARD SYSTEM CA1-XSRXVO3
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DOI：
10.1103/physrevlett.74.2539
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发表时间：
1995-03-27
影响因子：
8.6
通讯作者：
NISHIHARA, Y
中科院分区：
文献类型：
--
作者：
INOUE, IH;HASE, I;NISHIHARA, Y
我们提出了费米能级（E F）附近的单粒子态密度如何在莫特跃迁附近变化的实验证明。在金属钙钛矿型3d1 Mott-Hubbard体系Ca 1−x Sr x VO 3中，当降低x时，靠近E F的相干带的谱权逐渐转移到低于E F的下Hubbard带的前驱体的谱权。准粒子自能的动量依赖以及因此的远程交换或相关显示出随着从金属侧接近Mott跃迁而变得越来越重要。
We present an experimental manifestation of how the single-particle density of states around the Fermi level (E F) changes near a Mott transition. In a metallic perovskite-type 3 d 1 Mott-Hubbard system Ca 1− x Sr x VO 3, as one decreases x the spectral weight of the coherent band near E F is gradually transferred to that of the precursor of the lower Hubbard band∼ 2 eV below E F. The momentum dependence of the quasiparticle self-energy and hence the long-range exchange or correlation is shown to become progressively important as one approaches the Mott transition from the metallic side.