Next-generation ultrahigh density spin electronic devices University of Southampton in United Kingdom

This project is part of the EPSRC Center for Doctoral Training in Quantum Technology Engineering at the University of Southampton ( https://qte.ac.uk/ ). In addition to the research project outlined below you will receive substantial training in scientific, technical, and commercial skills.

Project Description

In this project we will utilize state-of-the-art 3D lithography in combination with state of the art electrodeposition to realise magnetic nanowires with controllable “flying” domain wall qubits, paving the way towards a quantum computer based upon spin textures in 3D magnetic nanowires.

A paradigm shift is occurring in nanomagnetism whereby nanostructuring materials into 3D geometries provides a foundation for next-generation ultrahigh density spin electronic devices, for which qubits can be encoded within spin textures or within magnetic domain wall racetracks [1]. Two-photon lithography in combination with deposition methods can enable the fabrication and exploration of the physics of 3D magnetic nanostructured materials [2]. Recently 3D magnetic nanowires with feature sizes of 70 nm and direct measurement of domain wall injection and pinning have paved the way to low energy, ultrahigh density magnetic data storage devices [3].

In this project we will utilise state-of-the-art 3D lithography at Cardiff University in combination with state of the art electrodeposition at Southampton to realise magnetic nanowires with controllable “flying” domain wall qubits [4], paving the way towards a quantum computer based upon spin textures in 3D magnetic nanowires. In particular this will involve the preparation of templates with tunable geometries and sizes by two-photon beam lithography that will be utilised for electrochemical deposition of magnetic materials to study static domain wall textures and dynamics. Successful candidates should ideally have an upper second class degree in either Chemistry, Materials Science, Physics or a related area.

[1] S. Li et al. Materials Today Quantum 2, 2950 (2024)

[2] G. Williams et al. Nano Research 11, 845 (2018)

[3] J. Askey et al. Nanoscale 16, 17793 (2024)

[4] Phys. Rev. Research 5, 033166 (2023)

Supervisory team : Dr Iris Nandhakumar

For more information, please contact the supervisor: Dr Iris Nandhakumar, [email protected]

Entry Requirements

Undergraduate degree (at least UK 2:1 honours degree, or international equivalent.

Closing date

Applications are accepted throughout the year for a start date in September 2025. Overseas students requiring funding must apply before 31 March 2025.

Funding

Funding on a competitive basis. For UK students, tuition fees and a stipend at the UKRI rate tax-free for 4 years. EU and Horizon Europe students are eligible for scholarships. Overseas students who have secured or are seeking external funding are welcome to apply.

How to apply

Apply online here : Select programme type “Research”, “Faculty of Engineering and Physical Sciences”, next page select “PhD Quantum Tech Eng”. In Section 2 of the application form insert the name of the supervisor.

Applications should include (further details on https://qte.ac.uk/phd-opportunities/ ):

Personal statement;

Curriculum Vitae;

Contacts of two referees;

Degree Transcripts/Certificates to date.

We are committed to promoting equality, diversity, and inclusivity and give full consideration to applicants seeking part-time study. The University of Southampton takes personal circumstances into account, has onsite childcare facilities, is committed to sustainability and has been awarded the Platinum EcoAward.