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Synthesis of 2 D semiconductors with honeycomb nanogeometry and study of their...

Synthesis of 2 D semiconductors with honeycomb nanogeometry and study of their Dirac type band structure and opto electronic properties Graphene redirected the pathways of solid-state physics with a revival of 2-D materials showing Dirac physics due to their honeycomb geometry. The charge carriers are fundamentally different from those in conventional electronic s... ver más

30/11/2021

3M€

Presupuesto del proyecto: 3M€

Líder del proyecto

UNIVERSITEIT UTRECHT No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Ver 2 Participantes

Financiación concedida El organismo H2020 notifico la concesión del proyecto el día 2021-11-30

ERC-ADG-2015: ERC Advanced Grant

I+D

Cerrada hace 9 años

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Información adicional privada

No hay información privada compartida para este proyecto. Habla con el coordinador.

2 Participantes

2.50M€ | Lider

IMMUNOSTEP

143.70K€ | Participante

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Duración del proyecto: 65 meses Fecha Inicio: 2016-06-29
Fecha Fin: 2021-11-30

Líder del proyecto

UNIVERSITEIT UTRECHT No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 3M€

Descripción del proyecto Graphene redirected the pathways of solid-state physics with a revival of 2-D materials showing Dirac physics due to their honeycomb geometry. The charge carriers are fundamentally different from those in conventional electronic systems: the energy vs. wave vector relationship is linear instead of quadratic, resulting in Dirac bands with massless carriers. A genuinely new class of materials will emerge provided that classic semiconductor compounds can be molded in the nanoscale honeycomb geometry: The Dirac-type band structure is then combined with the beneficial properties of semiconductors, e.g. a band gap, optical and electrical switching, and strong spin-orbit coupling. The PI recently prepared atomically coherent 2-D PbSe and CdSe semiconductors by nanocrystal assembly and epitaxial attachment. Moreover, he showed theoretically that these systems combine a semiconductor gap with Dirac-type valence and conduction bands, while the strong spin-orbit coupling results in the quantum spin Hall effect. The ERC advanced grant will allow him to develop a robust bottom-up synthesis platform for 2-D metal-chalcogenide semiconductor compounds with honeycomb nanoscale geometry. The PI will study their band structure and opto-electronic properties using several types of scanning tunnelling micro-spectroscopy and optical spectroscopy. The Fermilevel will be controlled with an electrolyte-gated transistor in order to measure the carrier transport properties. The results will be compared directly with those obtained on the same 2-D semiconductors without honeycomb geometry, hence showing the conventional band structure. This should unambiguously reveal the Dirac features of honeycomb semiconductors: valence band and conduction band Dirac cones, non-trivial band openings at the K-points that may host the quantum spin Hall effect, and non-trivial flat bands. 2-D semiconductors with massless holes and electrons open new opportunities in opto-electronic devices and spintronics.

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