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arXiv 0910.4377cond-mat.str-el
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Jeff,1/2莫特绝缘体Sr2IrO4电子结构随温度变化的光谱研究

Optical spectroscopic investigation on the temperature-dependent electronic structure evolution of the Jeff,1/2 Mott insulator Sr2IrO4

S. J. Moon, Hosub Jin, W. S. Choi, J. S. Lee, S. S. A. Seo, J. Yu, G. Cao, T. W. Noh, Y. S. Lee

摘要:

我们研究了杰夫,1/2莫特绝缘体Sr 2 IrO 4的电子结构的温度依赖性的演变,使用光学光谱。最近发现该化合物的光电导谱$σ(ω)$具有两个d-d跃迁,与Jeff,1/2和Jeff,3/2带之间的跃迁有关,这是由于电子相关和自旋轨道耦合的共同作用。随着温度的升高,这两个峰显示出显著的变化,导致Mott带隙减小。考虑到带宽的增加,将实验结果与第一性原理计算的结果进行了比较。从局域晶格畸变、激子效应、电子-声子耦合和磁有序等方面讨论了温度变化对Sr_2IrO_4电子结构的影响。

英文摘要:

We investigated the temperature-dependent evolution of the electronic structure of the Jeff,1/2 Mott insulator Sr2IrO4 using optical spectroscopy. The optical conductivity spectra $σ(ω)$ of this compound has recently been found to exhibit two d-d transitions associated with the transition between the Jeff,1/2 and Jeff,3/2 bands due to the cooperation of the electron correlation and spin-orbit coupling. As the temperature increases, the two peaks show significant changes resulting in a decrease in the Mott gap. The experimental observations are compared with the results of first-principles calculation in consideration of increasing bandwidth. We discuss the effect of the temperature change on the electronic structure of Sr2IrO4 in terms of local lattice distortion, excitonic effect, electron-phonon coupling, and magnetic ordering.

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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