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Development of a quantum spin-current generator


Department of Electronic Engineering

About the Project

We plan to observe new quantum phenomena by measuring nanoscale spintronic devices at very low-temperature. In particular, we first investigate Aharonov-Bohm (AB) effect and then focus on a persistent current induced in a non-magnetic nanoring under a non-uniform magnetic field application as predicted by Loss and Goldbart [1]. We will improve our nanofabrication processes to produce a nonmagnetic nanoring and a ferromagnetic structure. This device will offer a new method to generate a spin current.

The devices will be fabricated using the state-of-the-art electron beam lithography system in Leeds, where we have 25% share. This system can pattern 7 nm feature with stitching and overlay accuracy of <1 and <7 nm, respectively. The successful devices will be measured by our dilution refrigerator down to 350mK.

This project will involve collaboration with Japanese universities. It is preferable that the candidate has some hands-on experience on thin film growth in an ultrahigh vacuum and/or nanometric scale device characterisation. PhD students are normally given an opportunity to present their work at the annual domestic Magnetism conference and at least once in an international conference, such as the International Conference on Magnetism or Magnetism and Magnetic Materials.

Entry requirements:
Candidates should have (or expect to obtain) a minimum of a UK upper second class honours degree (2.1) or equivalent in Electronic and Electrical Engineering, Physics, Computer Science, Mathematics, Music Technology or a closely related subject.

How to apply:
Applicants should apply via the University’s online application system at https://www.york.ac.uk/study/postgraduate-research/apply/. Please read the application guidance first so that you understand the various steps in the application process.

Funding Notes

This is a self-funded project and you will need to have sufficient funds in place (eg from scholarships, personal funds and/or other sources) to cover the tuition fees and living expenses for the duration of the research degree programme. Please check the Electronic Engineering website View Website for details about funding opportunities at York.

References

[1] D. Loss and P. M. Goldbart, Phys. Rev. B 45, 13544 (1992).

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