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La formación de materia densa caliente: evidencia experimental para el endurecimiento de enlaces electrónicos en el
Ralph Ernstorfer1, Maher Harb, Christoph T Hebeisen
1Institute for Optical Sciences and Departments of Chemistry and Physics, 80 Saint George Street, University of Toronto, Toronto, ON M5S 3H6, Canada.
Science (New York, N.Y.)
|January 24, 2009
Resumen
La fuerte excitación óptica crea estados de no equilibrio. El oro oro oro oro oro oro oro.
Área de la Ciencia:
- Física de la materia condensada Física de la materia condensada Física de la materia condensada Física de la materia condensada Física de la materia condensada
- Ciencia de los materiales ciencia de los materiales.
- Química física es la química física de las cosas.
Sus antecedentes:
- Una fuerte excitación óptica puede inducir estados de materia altamente desequilibrados.
- La respuesta nuclear depende de la transferencia de energía electrón-núcleo y los potenciales interatómicos alterados.
Objetivo del estudio:
- Para investigar la evolución estructural del oro bajo fuerte excitación óptica.
- Para comprender la dinámica de la red y la estabilidad a altas temperaturas electrónicas.
Principales métodos:
- Se empleó difracción de electrones de femtosegundos para sondear los cambios estructurales.
- Se utilizaron altos niveles de excitación óptica (hasta 2,85 MJ/kg).
Principales resultados:
- La tasa de desordenamiento de la celosía dorada se retrasó con el aumento de la excitación.
- Esta retardación indica una mayor estabilidad de la celosía a altas temperaturas electrónicas efectivas.
Conclusiones:
- La estabilidad del enrejado se puede mejorar a altas temperaturas electrónicas, contrariamente a las expectativas generales.
- Demuestra una fuerte correlación entre la estructura electrónica y la unión de celosía en condiciones extremas.
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