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Pseudogap in elemental plutonium
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DOI：10.1103/PhysRevB.105.L041107.png)
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Abstract
En 中文
Electronic correlations associated with incipient magnetism have long been recognized as an important factor in stabilizing the largest atomic volume 8 phase of plutonium, yet their strength compared to those in the rare earths and neighboring actinides in the periodic table has largely remained a mystery. We show here using calorimetry measurements, together with prior detailed measurements of the phonon dispersion, that the 5 f electrons of the 8 phase reside in a pseudogapped state, accompanied by reductions in various physical properties below a characteristic temperature T * approximate to 100 K. The small characteristic energy scale of the pseudogapped state implies that the 5 f electrons in plutonium are much closer to the threshold for localization and magnetic order than has been suggested by state-of-the-art electronic structure theory, revealing plutonium to be arguably the most strongly correlated of the elements.
Keywords:
DELTA-PHASE
ELECTRONIC CONFIGURATION
THERMAL-EXPANSION
MAGNETIC-MOMENT
5F STATES
PU
TEMPERATURE
RESISTIVITY
VALENCE
PHYSICS
Journal
IF:
3.7
Papers:
15.4W
Citations:
41.0W