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El Instituto de Ciencia de Materiales de Madrid (ICMM) es un Instituto del Consejo Superior de Investigaciones Científicas (CSIC), perteneciente al Área de Ciencia y Tecnología de Materiales.

 

La misión del ICMM es generar nuevos conocimientos básicos y aplicados en materiales y procesos con alto valor añadido y su transferencia a los sectores productivos de ámbito local, nacional y europeo (el verdadero valor de los materiales está en su uso), la formación de nuevos profesionales en el campo de los materiales y la divulgación del conocimiento científico.

 

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Próximos Eventos

 

ENE19|12:00

ADVANCES IN MAGNETIC FORCE MICROSCOPY IMAGING: FROM PERMANENT MAGNETS TO BACTERIA
Miriam Jaafar  leer más

ENE23|12:00

Semiconductor nanowire photonics
Carsten Ronning  leer más

ENE26|12:00

Computational modeling of materials for heterogeneous catalysis:
The example of cerium oxide based catalysts

Verónica Ganduglia-Pirovano  leer más

Noticias

Reportaje en en el periódico El Mundo acerca de "La máquina española que fabrica polvo de estrella"

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14ª edición de Fotciencia. Fotografía seleccionada en la modalidad Micro a cargo de Luz Carime Gil del ICMM.

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Tuning the Graphene on Ir(111) adsorption regime by Fe/Ir surface-alloying

Jens Brede, Jagoda Slawinska, Mikel Abadia, Celia Rogero, J Enrique Ortega, Ignacio Piquero-Zulaica, Jorge Lobo-Checa, Andres Arnau and Jorge Iribas Cerdá

A combined scanning tunneling microscopy, x-ray photoelectron spectroscopy, angle-resolved photoemission spectroscopy, and density functional theory study of graphene on a Fe–Ir(111) alloy with variable Ir concentration is presented. Starting from an intercalated Fe layer between the graphene and Ir(111) surface we find that graphene–substrate interaction can be fine-tuned by Fe–Ir alloying at the interface. When a critical Ir-concentration close to 0.25 is reached in the Fe layer, the Dirac cone of graphene is largely restored and can thereafter be tuned across the Fermi level by further increasing the Ir content. Indeed, our study reveals an abrupt transition between a chemisorbed phase at small Ir concentrations and a physisorbed phase above the critical concentration. The latter phase is highly reminiscent of the graphene on the clean Ir(111) surface. Furthermore, the transition is accompanied by an inversion of the graphene's induced magnetization due to the coupling with the Fe atoms from antiferromagnetic when chemisorbed to weakly ferromagnetic in the physisorption regime, with spin polarizations whose magnitude may be tuned with the amount of Fe content.

2D Materials

STM topographs of Gr/Fe1-x{}_{1-x}$Irx/Ir(111). Close to 1 ML of Fe intercalated between Gr and Ir (x = 0, (a)), ~1 ML of Fe intercalated and post annealed at about 700 K (x = 0.29, (b)), ~1 ML of Fe intercalated and post annealed above 950 K (x = 0.76, (c)), and pristine Gr on Ir (x = 1, (d)). Fast Fourier transformations of (a)–(d) are given in the respective insets and demonstrate that the Gr/Ir moirè pattern stays intact. Line profiles along the indicated white lines in (a)–(d) are given in (e).

Publicaciones destacadas

ICMM-2017 - Sor Juana Inés de la Cruz, 3, Cantoblanco, 28049 Madrid, España. Tel: +34 91 334 9000. Fax: +34 91 372 0623. info@icmm.csic.es