Electronic structure of BaNi$_2$As$_2$

Bo Zhou; Min Xu; Yan Zhang; Gang Xu; Cheng He; L. X. Yang; Fei Chen; B. P. Xie; Xiao-Yu Cui; Masashi Arita; Kenya Shimada; Hirofumi Namatame; Masaki Taniguchi; X. Dai; D. L. Feng

doi:10.1103/PhysRevB.83.035110

Electronic structure of BaNi$_2$As$_2$

Superconductivity 2011-01-27 v2

Authors: Bo Zhou , Min Xu , Yan Zhang , Gang Xu , Cheng He , L. X. Yang , Fei Chen , B. P. Xie , Xiao-Yu Cui , Masashi Arita , Kenya Shimada , Hirofumi Namatame , Masaki Taniguchi , X. Dai , D. L. Feng

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

BaNi $_2$ As $_2$ , 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 $\bar{M}$ and differences along $\bar{\Gamma}$ - $\bar{X}$ . We further show that the electronic structure of BaNi $_2$ As $_2$ is distinct from that of the sibling iron pnictides. Particularly, there is no signature of band folding, indicating no collinear SDW 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 BaNi $_2$ As $_2$ .

Keywords

electronic structure electronic structure of materials phase transitions

Cite

@article{arxiv.1010.1905,
  title  = {Electronic structure of BaNi$_2$As$_2$},
  author = {Bo Zhou and Min Xu and Yan Zhang and Gang Xu and Cheng He and L. X. Yang and Fei Chen and B. P. Xie and Xiao-Yu Cui and Masashi Arita and Kenya Shimada and Hirofumi Namatame and Masaki Taniguchi and X. Dai and D. L. Feng},
  journal= {arXiv preprint arXiv:1010.1905},
  year   = {2011}
}

Comments

8 pages, 7 figures

Electronic structure of BaNi$_2$As$_2$

Abstract

Keywords

Cite

Comments

Related papers