Electronic structure of BaNi2As2
PhysRevB_83_035110.pdf 1.5 MB
Yang, L. X.
Xie, B. P.
Feng, D. L.
BaNi_2As_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 M^^- and differences along Г^^- -X^^-. We further show that the electronic structure of BaNi_2As_2 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 BaNi_2As_2.
Physical Review B
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The American Physical Society
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