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.


Published in:
Physical Review B, 60, 12, R8426-R8429
Year:
1999
ISSN:
0163-1829
Keywords:
Note:
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
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 Record created 2006-10-03, last modified 2018-03-18


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