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EPSRC iCase PhD in Physics: 2D Materials on Compound Semiconductors

  • Full or part time
  • Application Deadline
    Friday, March 15, 2019
  • Funded PhD Project (European/UK Students Only)
    Funded PhD Project (European/UK Students Only)

Project Description

Atomically-thin, inherently 2D semiconductors offer nano-scale devices with excellent response to light for ultra-low-power applications. Using exfoliated microflakes, devices and simple integrated circuits have been reported, underpinning potential applications in nano-optoelectronics. Exploring new device functionality along with materials scale-up are the next challenges; only recently have researchers started to address the integration of these materials into the compound semiconductor (CS) platform. Fewer than twenty labs world-wide are equipped to “grow” single-monolayer 2D materials using molecular beam epitaxy (MBE) or atomic layer deposition (ALD). Significantly fewer have the ability to address the hybrid 2D/CS heterostructure which provides an opportunity for academic exploration and industrial exploitation. Thus, the newly-established Cardiff MBE facility, the well-equipped Ser-Cymru Laboratory supported by Oxford ALD provide an internationally unique setting for this CASE Studentship.

Project aims and methods: This student will develop, analyse and simulate a select family of 2D materials (MoS2, WS2 and WSe2) integrated into the GaN platform for optoelectronic applications. She/he will learn/develop new methods to include 2D deposition using both ALD (Oxford), simple exfoliation/transfer methods (Cardiff) along with hybrid heterostructures comprised of 2D/(InAl)GaN alloys (MBE) noting that MoS2 is lattice-matched to In0.15Ga0.85N. Analysis of these new heterostructures includes research-to-wafer-scale xray diffraction, photoluminescence, time-resolved-photoluminescence along with Raman, and supported by band structure simulation. The student will also explore opportunities within PHYSX-CMP and ENGIN Materials Network for complimentary characterization methods and collaborations.

Scientific excellence and outcomes: The challenge of producing highly-crystalline 2D layers via ALD on III-V systems is expected to result in scientific breakthroughs including single-monolayer 2D crystals at moderate process temperatures followed by control of the underlying physics in 2D/III-N alloys, interfaces and heterostructures. Anticipated outcomes include the demonstration and analysis appropriate for future scale-up leading to continued Cardiff-Oxford collaborations such as the EPSRC “Adventurous Manufacturing” Proposal (bid-in-progress).

Funding Notes

Full UK/EU tuition fees plus stipend matching UKRI Minimum.

Full awards are open to UK Nationals and EU students who meet UK residency requirements. To be eligible for the full award, EU Nationals must have been in the UK for at least three years prior to the start of the course including for full-time education.

A small number of awards may also be made available to EU Nationals who do not meet the above residency requirement, provided they have been ordinarily resident in the EU for at least three years before the start of their proposed programme of study

How good is research at Cardiff University in Physics?

FTE Category A staff submitted: 19.50

Research output data provided by the Research Excellence Framework (REF)

Click here to see the results for all UK universities

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