Indexed by: Journal paper

First Author: Bo Zhou

Correspondence Author: D. L. Feng

Co-author: 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

Journal: Physical Review B

Included Journals: SCI

Discipline: 物理学

Document Type: J

Volume: 83

Issue: 3

Page Number: 035110

ISSN No.: 2469-9950

Date of Publication: 2011-01-13

Impact Factor: 3.691

Abstract: 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.