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タイトル
和文: 
英文:Photoemission and DMFT study of electronic correlations in SrMoO3: Effects of Hund’s rule 
著者
和文: 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.  
英文: 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.  
言語 English 
掲載誌/書名
和文: 
英文:Physical Review B 
巻, 号, ページ 90    20    205131
出版年月 2014年11月20日 
出版者
和文: 
英文:American Physical Society 
会議名称
和文: 
英文: 
開催地
和文: 
英文: 
公式リンク http://link.aps.org/doi/10.1103/PhysRevB.90.205131
 
DOI https://doi.org/10.1103/PhysRevB.90.205131
アブストラクト 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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