Electronic-structure evolution through the metal-insulator transition in RNiO3 | |
Article | |
关键词: PEROVSKITES; PRNIO3; PHOTOEMISSION; SPECTROSCOPY; NDNIO3; STATE; GAP; ND; | |
DOI : 10.1103/PhysRevB.60.R8426 | |
来源: SCIE |
【 摘 要 】
We performed a photoemission investigation of the electronic structure of PrNiO3 and NdNiO3 through the first order (paramagnetic) metal to (antiferromagnetic) insulator transition. Surprisingly, the data reveal a temperature-dependent loss of spectral weight near the chemical potential, which extends well below the coincident metal-insulator (T-MI) and magnetic (T-Neel) transition temperatures. This is in contrast with the behavior in SmNiO3 and EuNiO3, where the two transitions are separate. The spectral properties clearly indicate two distinct regimes for RNiO3 with T-MI = T-Neel and T-MI > T-Neel.
【 授权许可】
Free