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