Angle-resolved photoemission spectroscopy of perovskite-type transition-metal oxides and their analyses using tight-binding band structure
Angle-resolved photoemission spectroscopy of perovskite-type transition-metal oxides and their analyses using tight-binding band structure
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DOI：
10.1080/01411590600826672
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发表时间：
2006-03
影响因子：
1.6
通讯作者：
H. Wadati;T. Yoshida;A. Chikamatsu;H. Kumigashira;M. Oshima;H. Eisaki;Z. Shen;T. Mizokawa;A. Fujimori
中科院分区：
文献类型：
--
作者：
H. Wadati;T. Yoshida;A. Chikamatsu;H. Kumigashira;M. Oshima;H. Eisaki;Z. Shen;T. Mizokawa;A. Fujimori
如今，它已成为可行的角度分辨光电发射光谱（ARPES）测量过渡金属氧化物的三维钙钛矿结构，由于高品质的单晶体和外延薄膜的可用性。在这篇文章中，我们回顾了最近的实验结果和解释ARPES数据使用经验紧束缚能带结构计算。本文给出了SrVO 3（SVO）大块单晶和La 1 − x Sr x FeO 3（LSFO）和La 1 − x Sr x MnO 3（LSMO）薄膜的结果。在SVO的情况下，从比较的实验结果与计算的表面电子结构，我们得出的结论是，得到的能带色散反映了体电子结构。在G-型反铁磁态和铁磁态的假设下，对LSFO和LSMO的实验能带结构进行了分析。我们还表明，固有的不确定性的电子动量垂直于晶体表面是很重要的三维材料的APRES结果的解释。
Nowadays it has become feasible to perform angle-resolved photoemission spectroscopy (ARPES) measurements of transition-metal oxides with three-dimensional perovskite structures owing to the availability of high-quality single crystals of bulk and epitaxial thin films. In this article, we review recent experimental results and interpretation of ARPES data using empirical tight-binding band-structure calculations. Results are presented for SrVO3 (SVO) bulk single crystals and La1− x Sr x FeO3 (LSFO) and La1− x Sr x MnO3 (LSMO) thin films. In the case of SVO, from comparison of the experimental results with calculated surface electronic structure, we concluded that the obtained band dispersions reflect the bulk electronic structure. The experimental band structures of LSFO and LSMO were analyzed assuming the G-type antiferromagnetic state and the ferromagnetic state, respectively. We also demonstrated that the intrinsic uncertainty of the electron momentum perpendicular to the crystal surface is important for the interpretation of the APRES results of three-dimensional materials.