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Post-doctoral Fellow in Low temperature, multi STM tip atomic scale measurements on a graphene nano

Employer
Global Academy Jobs
Location
France
Closing date
Jun 15, 2018

Job Details

A post-doctoral position in experimental physics is open in the CEMES-CNRS NanoSciences group as part of the Toulouse LABEX NEXT. The objectives are to control and then measure at the atomic scale the spectroscopic and electronic transport properties through a single nano-graphene on insulator using the LT-UHV 4-STM, a 4-head STM microscope functioning at low temperature and with a unique few picometers precision[1].

Nano-graphenes (NG) obtained by on-surface chemical synthesis (polyaromatic molecules) or by controlled 2D growth (nano-islands) offer new substrates for the construction of atomic and molecular electronic circuits. Considering a single NG at the surface of an insulating substrate, we propose first to study the electronic transport between two and then several STM tip apexes (including at least one STM tip grounded or floating [2]) with tip end apexes spaced by a few tens of nanometers. STM tip by STM tip, the focus will be in particular put on the determination of the different "tip STM - NG surface" electronic contact regimes: tunnel, pseudo-ballistic, chemical and on the influence of the inter-tip apex distance on the transport regimes through the NG. The experimental conditions to transform the atomic structure at the edge of an NG and then at its centre will be determined to construct atom by atom the first prototypes of electronic circuits at the atomic scale on NG. A specific care will be taken in the preparation of STM tip apexes by FIB sharpening and UHV reconditioning to produce a very small radius of curvature at their apex.

The candidate will be in charge of studying electronic properties of nanographenes on insulating substrates with an LT-UHV 4-STM in its independent multiple STM tips configuration. He / She will fabricate ultra-sharp STM tip apex to minimize the inter-tip apex distances to study the electronic contact and transport regimes on the nanographene before exploring surface atomic manipulation on a nanographene for electronic circuit construction.

The selected candidate is expected to have extensive experience in LT-UHV-STM and STS as well as in advance preparation of STM tip apex. An experience in atomic manipulation with STM on surface is desired. The initial contract is one year.

 

References

[1] Eur. J. Phys. AP, 73, 10702 (2016)

[2] J. Phys. Cond. Matter, 29, 444004 (2017).

Applications consisting of a full CV, motivation letter and a list of 3 referees and contact details.

The submitted applications will undergo pre-selection. Short-listed  applicants will be call for a webinar follow by interview.

Final ranking after interviews will lead to job offer based on the rank.

The initial contract is one year.

Company

Global Academy Jobs works with over 250 universities worldwide to promote academic mobility and international research collaboration. Global problems need international solutions. Our jobs board and emails reach the academics and researchers who can help.

"The globalisation of higher education continues apace, driving in turn the ongoing development of the global knowledge economy, striving for solutions to the world’s problems and educating a next generation of leaders and contributors."

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