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|Title:||Laser-induced charge-disproportionated metallic state in LaCoO3|
Boothroyd, A. T.
Molodtsov, S. L.
|Publisher:||American Physical Society|
|Citation:||Laser-induced charge-disproportionated metallic state in LaCoO3 / M. Izquierdo, M. Karolak, C. Trabant, et al. — DOI 10.1103/PhysRevB.90.235128 // Physical Review B - Condensed Matter and Materials Physics. — 2014. — Vol. 90. — Iss. 23. — 235128.|
|Abstract:||Understanding the origin of the spin transition in LaCoO3 is one of the long-standing aims in condensed matter physics. Aside from its fundamental interest, a detailed description of this crossover will have a direct impact on the interpretation of the semiconductor-to-metal transition (SMT) and the properties of the high-temperature metallic phase in this compound, which has shown to have important applications in environmentally friendly energy production. To date, the spin transition has been investigated mainly as a function of temperature in thermal equilibrium. These results have hinted at dynamical effects. In this paper, we have investigated the SMT by means of pump-probe soft x-ray reflectivity experiments at the O K, Co L, and La M edges and theoretical calculations within a DFT++ formalism. The results point towards a laser-induced metallization in which the optical transitions stabilize a metallic state with high-spin configuration and increased charge disproportionation. © 2014 American Physical Society.|
|Appears in Collections:||Научные публикации, проиндексированные в SCOPUS и WoS CC|
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