Electronic-structure evolution through the metal-insulator transition in RNiO3
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.
Ecole Polytech Fed Lausanne, Inst Phys Appl, CH-1015 Lausanne, Switzerland. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Univ Maine, UPRES A CNRS 6010, Lab Fluorures, F-72017 Le Mans, France. Vobornik, I, Ecole Polytech Fed Lausanne, Inst Phys Appl, CH-1015 Lausanne, Switzerland.
ISI Document Delivery No.: 241EB
Record created on 2006-10-03, modified on 2016-08-08