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Exciton dynamics in diamond and two-dimensional metal dichalcogenide enabled van der Waals heterostructures


Cardiff School of Physics and Astronomy

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Prof Oliver Williams , Dr BH Hou Applications accepted all year round Self-Funded PhD Students Only
Cardiff United Kingdom Electrical Engineering Energy Technologies Nanotechnology Optical Physics Chemistry Engineering Materials Science Physics Physical Chemistry Solid State Physics

About the Project

Two-dimensional (2D) materials offer a platform that allows the creation of heterostructures with a variety of properties. One- atom-thick crystals now comprise a large family of these materials, collectively covering a comprehensive range of features and numerous intrigue scientific challenges. For instance, the property of CVD synthesised atomically thin 2D materials have strong substrate dependence associated with their epitaxial lattice growth.
Moreover, atomically thin 2D materials can be assembled in vertical stacks that are held together by relatively weak van der Waals forces, enabling coupling between monolayer crystals with incommensurate lattices and arbitrary mutual rotation. In this project, we will fabricate new-type of heterostructures based on incommensurate molybdenum diselenide/disulfide (MoSe2 or MoS2) or tungsten disulfide/diselenide (WS2 or WSe2) monolayers with Diamond, and we will investigate a series intrigue excitonic bands hybridisation, exciton dynamics under radiation, and optoelectronic device studies (phototransistor, photodetectors and LEDs). These findings underpin strategies for band-structure engineering in semiconductor devices based on van der Waals heterostructures grown on Diamond.

Start date: April, July or October 2021. 4 years Full Time.

How to Apply:

Applicants should submit an application for postgraduate study via the Cardiff University webpages (https://www.cardiff.ac.uk/study/postgraduate/research/programmes/programme/physics-and-astronomy) including:

• an upload of your CV
• a personal statement/covering letter
• two references
• Current academic transcripts

Applicants should select Doctor of Philosophy, with a start date of April, July or October 2021.

In the research proposal section of your application, please specify the project title and supervisors of this project and copy the project description in the text box provided. In the funding section, please select the ’self -funding’ option.

Candidates should hold a good bachelor’s degree (first or upper second-class honours degree) or a MSc degree in Physics or a related subject.

Applicants whose first language is not English will be required to demonstrate proficiency in the English language (IELTS 6.5 or equivalent).


Funding Notes

Self-Funded PhD Students Only


This PhD position is opening for self-funded student only, which means the candidate with own funding to cover the living cost and tuition fees will be considered.

References

1. ACS Appl. Mater. Interfaces 11, 43, 40826-40834 (2019)
2. Sci Rep 9, 2911 (2019)
3. Nanoscale, 11, 10266-10272 (2019)
4. ACS Nano, 13, 11, 13047-13055 (2019)
5. Nature 567, 81–86 (2019)
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