论文类型：期刊论文
第一作者：Bo Zhou
通讯作者：D. L. Feng
合写作者：X. Dai,Masaki Taniguchi,Hirofumi Namatame,Kenya Shimada,Masashi Arita,Xiao-Yu Cui,B. P. Xie,Fei Chen,L. X. Yang,Cheng He,Gang Xu,Yan Zhang,Min Xu
发表刊物：Physical Review B
收录刊物：SCI
学科门类：物理学
文献类型：J
卷号：83
期号：3
页面范围：035110
ISSN号：2469-9950
发表时间：2011-01-13
影响因子：3.691
摘要：BaNi2As2, with a first-order phase transition around 131 K, is studied by the angle-resolved photoemission spectroscopy. The measured electronic structure is compared to the local-density approximation calculations, revealing similar large electronlike bands around M̄ and differences along Γ̄-X̄. We further show that the electronic structure of BaNi2As2 is distinct from that of the sibling iron pnictides. Particularly, there is no signature of band folding, indicating no collinear spin-density-wave-related magnetic ordering. Moreover, across the strong first-order phase transition, the band shift exhibits a hysteresis, which is directly related to the significant lattice distortion in BaNi2As2.