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中国国家留学基金委和英国埃克塞特大学合作奖学金（博士生项目）(博士招生）
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中国国家留学基金委和英国埃克塞特大学合作奖学金（博士生项目） China Scholarship Council and University of Exeter PhD Scholarships Probing spin effects in two-dimensional materials beyond graphene About the award： The University of Exeter combines world-class research with high levels of student satisfaction at its campuses in Exeter and Cornwall, South West England. Formed in 1955, the University has over 21,000 students from more than 130 different countries. Exeter has been a leader in cutting-edge science, engineering, mathematics and medicine research and 98% of our research has been rated as of international quality. The University of Exeter is proud to offer up to 10 full-time PhD scholarships in collaboration with the China Scholarship Council (CSC) （www.csc.edu.cn）for Chinese students starting in the academic year 2019-2020. Supervisors： Primary: Dr Annette Plaut (A.S.Plaut@exeter.ac.uk), Physics and Astronomy Additional: Prof Mikhail (Misha) Portnoi, Physics and Astronomy Project Description： The possibility of using the spin of electrons to achieve faster and more energy efficient electronic devices is a central concept of both spintronics and quantum computing. However the lack of an effective means for the successful generation, manipulation and electrical detection of the electron spin within semiconductors remains an outstanding challenge. Graphene is a two-dimensional honeycomb structure of carbon atoms. However due to the small size of the carbon atom, graphene does not exhibit measurable spintronic effects. Instead graphene is now being superseded by other twodimensional materials such as the transition metal dichalcogenides, where the honeycomb lattice is made up of, for instance, a combination of a transition metal atom and two sulphur or selenium atoms. The larger inherent spin-orbit interaction in such transition metal dichalcogenides (due to the large size of the transition metal atom, combined with their crystal inversion asymmetry – unlike graphene) make spintronic effects detectable in these new two-dimensional materials. Spin-orbit coupling is the most fundamental spin-dependent interaction in non-magnetic semiconductors. It is a relativistic effect that couples the charge-carrier spin to its orbital momentum. In the spin Hall effect, on passing a current through the sample, the spin-orbit interaction drives the charge carriers with up and down spins to opposite sides of the sample. Here, unlike in the classical Hall effect, it is the intrinsic spin-orbit coupling that causes the charge carriers to move transverse to the current rather than an external magnetic field. However the spin Hall effect is not electrically detectable due to the charge-balanced nature of its transverse spin currents. But by optically polarizing the charge carrier spins, the transverse current becomes charge-imbalanced and a Hall voltage can be measured in the absence of a magnetic field. This studentship will fund you to investigate manifestations of the spin Hall effect, and also the closely-related valley Hall effect, via such optically-polarized photo transport techniques, as well as Kerr rotation spectroscopy. You will search for the spin Hall effect in these two-dimensional materials and confirm the existence of the valley Hall effect whose origin is the subject of much debate presently. In essence the valley Hall effect arises due to the bandstructure of such two-dimensional materials possessing two unequal valleys at the Dirac points. The spin polarization of the charge carriers is coupled to the valley in which they reside. It is theoretically predicted that photoexcitation of the charge carriers with linearly-polarized light will result in the carriers belonging to the two different valleys moving in opposite directions. This you will detect purely optically, by measuring the spatial distribution of the circularly-polarized photoluminescence in two-dimensional materials. During your PhD you will join the vibrant Exeter University Graphene Centre encompassing state-of-the-art facilities and training opportunities providing you with a wide variety of highly employable skills and techniques. Eligibility: Applicants must be citizens or permanent residents of the People’s Republic of China at the time of application and intend to return toCChina upon completion of their studies at the University of Exeter. The scholarship will be awarded on the basis of academic merit with candidates requiring the equivalent of a Distinction in a UK Master’s degree from a prestigious university (Typically an average of 85% or above from a Chinese Higher Education Institution). Successful candidates will meet the relevant academic requirements as well as the English language proficiency requirements for entry into a PhD programme set out by the University of Exeter. Applicants are generally expected to have a score of IELTS 6.5 – 7.0 or equivalent overall with no less than 6.0 in any section. Candidates will also be required to satisfy the selection criteria set out by CSC. Details can be found China Scholarship Council's website. (https://www.csc.edu.cn/) Funding: Full tuition fees of successful applicants will be funded by the relevant College at the University of Exeter. The China Scholarship Council will provide a living allowance, including the cost of a return flight from China to the UK, accommodation and subsistence, depending on the applicant’s eligibility. Apply: Applications for 2019 entry are now open. Apply for a China Scholarship Council and University of Exeter PhD scholarship here (https://www.exeter.ac.uk/studying/funding/award/?id=3258) Important Dates: Monday 7 January Deadline for receipt of application to the University of Exeter Thursday 28 February 2019 Offer issue and receipt of College nominations Tuesday 20 March - Thursday 5 April 2019 Application to China Scholarship Council May 2019 Announcement of successful scholars Contact Us Project-specific queries should be directed to Dr Annette Plaut: A.S.Plaut@exeter.ac.uk For general information about studying at the University of Exeter, you can contact International Student Recruitment - East Asia Team based in Beijing and Shanghai at the following email address: eastasia@exeter.ac.uk If you have any questions about Postgraduate Research at the University of Exeter, you can contact the Doctoral College team at: pgrenquiries@exeter.ac.uk. The University of Exeter Doctoral College brings together institution-wide support, training, and administration for all of our postgraduate and early career researchers. The Doctoral College works across all six Academic Colleges within the University as well as key Professional Services, to ensure that postgraduate and early career researchers have an outstanding start to their research careers. Find out more (https://www.exeter.ac.uk/doctoralcollege/aboutus/#oHLYKx0fRL8u4OJM.99). |
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