Electronic structure of BaNi2P2 observed by angle-resolved photoemission spectroscopy
Electronic structure of BaNi2P2 observed by angle-resolved photoemission spectroscopy
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角分辨光电子能谱观察BaNi2P2的电子结构
DOI：
10.1103/physrevb.89.195138
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
and A. Fujimori
中科院分区：
文献类型：
--
作者：
S. Ideta;T. Yoshida;M. Nakajima;W. Malaeb;H. Kito;H. Eisaki;A. Iyo;Y. Tomioka;T. Ito;K. Kihou;C. H. Lee;Y. Kotani;K. Ono;S. K. Mo;Z. Hussain;Z.-X. Shen;H. Harima;S. Uchida;and A. Fujimori
我们用角分辨光电子能谱（ARPES）研究了在2.5K下的超导转变。我们观察到空穴和电子费米面（FS）周围的布里渊区中心和角落，分别和空穴FS的形状显着变化的光子能量，表明强的三维性。所观察到的FS与能带结构计算和de Haas-van Alphen测量结果一致。在正常状态下的质量增强因子估计为/2，表明弱电子相关相比，典型的铁磷属元素化物超导体。与BaNiAs相比，在该点周围观察到类电子费米面，这可能与较高的费米面有关。
We have performed an angle-resolved photoemission spectroscopy (ARPES) study ofthat shows a superconducting transition at2.5 K. We observed hole and electron Fermi surfaces (FSs) around the Brillouin zone center and corner, respectively, and the shapes of the hole FSs dramatically changed with photon energy, indicating strong three dimensionality. The observed FSs are consistent with band-structure calculations and de Haas-van Alphen measurements. The mass enhancement factors estimated in the normal state were/2, indicating weak electron correlation compared to typical iron-pnictide superconductors. An electronlike Fermi surface around thepoint was observed in contrast with BaNiAsand may be related to the higherof.