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arXiv 0712.3083cond-mat.str-el
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电子掺杂SrTiO3的相干态和非相干态

Coherent and Incoherent States of Electron-doped SrTiO3

Y. Ishida, R. Eguchi, M. Matsunami, K. Horiba, M. Taguchi, A. Chainani, Y. Senba, H. Ohashi, H. Ohta, S. Shin

摘要:

Nb掺杂SrTiO 3薄膜中Ti 2 p和O 1 s边的共振光电子能谱表明,费米能级(EF)处的相干态(CS)主要具有Ti 3d态的特征,而位于EF以下约1.5 eV处的非相干隙内态(IGS)具有Ti 3d态和O 2 p态的混合特征。这表明IGS是由CS的光谱重量转移和随后的光谱重量重新分布通过d-p杂化形成的。我们讨论了三维带填充的激发光谱的演变和合理化的IGS通过类似的机制,提出了由Halfenstein和安德森。

英文摘要:

Resonant photoemission at the Ti 2p and O 1s edges on a Nb-doped SrTiO3 thin film revealed that the coherent state (CS) at the Fermi level (EF) had mainly Ti 3d character whereas the incoherent in-gap state (IGS) positioned ~1.5 eV below EF had mixed character of Ti 3d and O 2p states. This indicates that the IGS is formed by a spectral-weight transfer from the CS and subsequent spectral-weight redistribution through d-p hybridization. We discuss the evolution of the excitation spectrum with 3d band filling and rationalize the IGS through a mechanism similar to that proposed by Haldane and Anderson.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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