In-Situ Characterization Of Ultrafast (Photo)Transport And Electroluminescence At The Nanoscale (...

Universities and Institutes of France
December 30, 2022
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Offerd Salary:Negotiation
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Contract Type:Temporary
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  • Organisation/Company: Institut d'électronique de microélectronique et de nanotechnologie
  • Research Field: Physics Technology › Materials technology
  • Researcher Profile: First Stage Researcher (R1) Recognised Researcher (R2) Established Researcher (R3) Leading Researcher (R4)
  • Application Deadline: 30/12/2022 00:00 - Europe/Athens
  • Location: France › Lille
  • Type Of Contract: Temporary
  • Job Status: Full-time
  • The PhD candidate for the project INFERNO will develop a new experimental technique, which combines the spatial resolution of the 4-probe STM with the temporal resolution of a femtosecond optical pump-probe setup, with unprecedented spatial and temporal resolution, for applications to vdW heterostructures and devices.

    The genuine craze for nanomaterials and their heterostructures is intimately linked to their potential for a wealth of applications, from drug delivery to quantum communications. Over the past few years, low dimensional systems, in particular 2D materials have benefited from tremendous material-oriented efforts that enabled growing intrinsic systems, such as encapsulated 2D transition metal dichalcogenide (TMDC)1 or colloidal CdSe nanoplatelets2 with minimal spatial inhomogeneity and inhomogeneous broadening effects. These striking structural and optical properties make 2D materials ideal candidates to take over conventional materials in opto-electronic applications. So far, the understanding of their electronic and optical properties, in correlation with their growth, has been sought at the expense of the most challenging properties to measure at the nanoscale: transport. Such properties make the direct link between the fundamental research and the actual device. Any opto- electronic application based on nanomaterials requires a holistic knowledge on how fast charge carriers can be injected or extracted after electrical or optical excitation at the nanoscale. There is no instrumental technique available yet to characterize the charge carriers with simultaneous high spatial and temporal resolution.

    This is the key objective of the project INFERNO: the development of an innovative instrument capable of performing multiscale spatial and temporal in-situ analysis of the basic physical mechanisms that underpin the operation of opto-electronic materials and devices. This new correlative spectroscopy will allow for performing a tomography of the intrinsic properties of nanomaterials and their heterostructures such as the carrier mobility, the resistivity, the free carrier dynamics across interfaces, or the nature of the transport (ballistic, diffusive). Not only setting a hallmark on fundamental parameters, this technique will enable the local injection of charge carriers to unveil the hitherto unknown physical mechanisms limiting the electroluminescence of nanostructure-based device.

    As the rise of 2DM is fuelling an unprecedented cross-disciplinary research effort, at the interface between physics, chemistry, materials science and engineering, ultraclean van der Waals heterostructures (vdWh) will be custom-designed specifically for this project; they will be the materials of choice for test, development and benchmarking of INFERNO and lay the ground for advanced fundamental studies using this new platform.

    Reference

    1. Cadiz, F. et al. Excitonic linewidth approaching the homogeneous limit in MoS2-based van der Waals heterostructures. Phys. Rev. X 7, 021026 (2017).

    2. Ithurria, S. et al. Colloidal nanoplatelets with two-dimensional electronic structure. Nat. Mater. 10, 936–41 (2011).

    Funding category: Financement public/privé

    ANR

    PHD Country: France

    Offer Requirements Specific Requirements

    We are looking for an excellent and highly motivated candidate with a Master degree in physics, solid state physics, semiconductor physics or a relevant field.

    The candidate is expected to be self-driven, to have strong work-capacity, enthusiasm for science and strong appetite for instrumental development. A good command of English language, with excellent oral and written skills are required.

    Knowledge in STM, AFM, electron microscopy, UHV or pump-probe microscopy is required, experience is a plus. Engineering skills are highly appreciated.

    Applications are encouraged from all sectors of the community, reflecting the team's commitment to equality and diversity. Female candidates are especially encouraged to apply.

    The applicant must have an European citizenship or must have obtained his/her Master degree in Europe.

    Contact Information
  • Organisation/Company: Institut d'électronique de microélectronique et de nanotechnologie
  • Organisation Type: Large Company
  • Website: https:// https:// /www. iemn.fr/la-recherche/les- groupes/physique/nanostructures-q...
  • Country: France
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