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Controlling mesoscopic phase separation

Obiettivo

Conventionally, electronic device functions are generated by combining various materials, in which each material has one particular functionality. With the atomic limit as the ultimate achievable goal in sight, we try to explore methods that do not need ex tensive use of top-down nanotechnology, including lithography and deposition/etching techniques, but use device structures that are spontaneously created by nature in the general framework of electronic phase separation. Here one material can adopt more th an one electronic state, and by judicious organization of these electronic states device functions can be generated with built-in atomic precision. In a number of materials like manganites, a spectacularly diverse range of exotic magnetic, electronic and c rystal structures can coexist at different locations on the same crystal. What looks in one sense like awkward complexity is in fact a route toward engineering without the difficulties of atomic scale lithography - by manipulating the propensity of phase s eparation and phase coexistence in these materials we may make dynamically controlled functional electronic structures. The coexisting phases may form robust magnetic, electronic and crystallographic textures on "mesoscopic" length scales. By controlling a n array of textured phases analogous to those in liquid crystals we may be able to control locally the electronic structure and properties without atomic-scale fabrication. In manganites, for example, a simple domain wall in the ferromagnetic metallic phas e could spontaneously develop an insulating barrier of the charge order phase creating the ultimate spin-tunnel junction. COMEPHS is the first European project that aims to concentrate all necessary resources in Europe in order to achieve functionality of mesoscopic textured states. The research aims to provide basis for a new set of electronic technology and COMEPHS is expected to ensure European preeminence in this strategic domain.

Campo scientifico

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Programma(i)

Argomento(i)

Invito a presentare proposte

FP6-2003-NMP-TI-3-MAIN
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Meccanismo di finanziamento

STIP - Specific Targeted Innovation Project

Coordinatore

NATIONAL TECHNICAL UNIVERSITY OF ATHENS
Contributo UE
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Indirizzo
Heroon Polytechneiou st. 9
ZOGRAFOU, ATHENS
Grecia

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Ultimo aggiornamento: 25 Ottobre 2010

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Permalink: https://cordis.europa.eu/project/id/517039/it

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