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Title
Japanese: 
English:Photoemission and DMFT study of electronic correlations in SrMoO3: Effects of Hund’s rule 
Author
Japanese: 和達大樹, Jernej Mravlje, 吉松 公平, 組頭 広志, 尾嶋正治, 岡根 哲夫, 池永 英司, 藤森 淳, A. Georges,, A Radetinac, 高橋 圭, 川崎 雅司, 十倉 好紀.  
English: H. Wadati, Jernej Mravlje, K. Yoshimatsu, H. Kumigashira, M. Oshima, T. Sugiyama, E. Ikenaga, A. Fujimori, A. Georges,, A Radetinac, K.S. Takahashi, Masashi Kawasaki, Yoshinori Tokura.  
Language English 
Journal/Book name
Japanese: 
English:Physical Review B 
Volume, Number, Page 90    20    205131
Published date Nov. 20, 2014 
Publisher
Japanese: 
English:American Physical Society 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL http://link.aps.org/doi/10.1103/PhysRevB.90.205131
 
DOI https://doi.org/10.1103/PhysRevB.90.205131
Abstract We investigate the electronic structure of a perovskite-type Pauli paramagnet SrMoO 3 (t 2g 2 ) thin film using hard x-ray photoemission spectroscopy and compare the results to realistic calculations that combine density functional theory within the local-density approximation (LDA) with dynamical mean-field theory (DMFT). Despite the clear signature of electron correlations in the electronic specific heat, the narrowing of the quasiparticle bands is not observed in the photoemission spectrum. This is explained in terms of the characteristic effect of Hund's rule coupling for partially filled t 2g bands, which induces strong quasiparticle renormalization already for values of Hubbard interaction which are smaller than the bandwidth. This interpretation is supported by DMFT model calculations including Hund's rule coupling, which show a renormalization of low-energy quasiparticles without affecting the overall bandwidth. The photoemission spectra show additional spectral weight around −2.5 eV that is not present in the LDA+DMFT results, pointing to a source of correlations that is not present in our calculations that include only on-site interactions. We interpret this weight as a plasmon satellite, which is supported by the measured core-level spectra that all show satellites at this energy.

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