Background

I completed a Master of Physics (MPhys) degree at the University of Warwick in 2019. In the summer of 2018 I completed an eight week research project through the Undergraduate Research Support Scheme (URSS) on Skyrmionic materials under the supervision of Prof. Geetha BalakrishnanLink opens in a new window. I am currently researching unconventional superconductivity under the supervision of Dr Martin LeesLink opens in a new window, co-supervised by Prof. Geetha BalakrishnanLink opens in a new window.

Research Interests

My interests lie in exploring the unconventional behaviour of a range of superconducting materials. The unconventionality can arise from any of the following: the pairing mechanism of the electrons within the Cooper pairs, the symmetry of the Cooper pair wavefunction, and the group symmetries that are broken when transitioning from the normal to the superconducting state.

This project aims to better understand the underlying mechanisms that drive unconventional superconductivity in new materials, which have the potential to be used in a range of applications. Previously studied materials will also be explored to gain a new and better insight into their exotic properties.

The project involves preparing polycrystalline and single crystal samples using a range of crystal growth techniques, and studying their normal and superconducting state behaviour through structural, thermodynamic, magnetic and transport measurements, at high magnetic fields and at low temperatures. Materials of interest exhibit properties such as strong spin-orbit coupling or a noncentrosymmetric crystal structure. These materials will also be investigated at national and international facilities using techniques such as muon spectroscopy, which investigates time reversal symmetry breaking.

Publications

D. G. C. Jonas, P. K. Biswas, A. D. Hillier, D. A. Mayoh, and M. R. Lees, Quantum muon diffusion and the preservation of time-reversal symmetry in the superconducting state of type-I rhenium, Physical Review B 105, L020503 (2022).Link opens in a new window

Conferences

Oral Presentations

"A muon‐spin relaxation study of type‐I rhenium investigating time‐reversal symmetry breaking in the superconducting state" UK Neutron and Muon Science and User Meeting (2022).

Poster Presentations

• ISIS Student Meeting, Virtual Meeting (2020)
• Condensed Matter and Quantum Materials IOP (2021)
• 15^th International Conference on Muon Spin Rotation, Relaxation and Resonance [MuSR2020] (2022)

Courses Taken

MPAGS

• Classical and Quantum Phase Transitions (2019/20)
• LabVIEW Core 1 (2019/20)
• LabVIEW Core 2 (2019/20)
• PX918 Electronic Structure Theory for Experiments and Models
• PX919 Quantum Chemistry

Teaching Experience

I have supported second year undergraduate students as a demonstrator in the microprocessors laboratory since 2019. I have also demonstrated in the first year undergraduate electronics laboratory in 2022.

In November 2021 I was awarded the status of Associate Fellow of the Higher Education Academy (AFHEA)Link opens in a new window. The main aspect of this was a reflective narrative piece, in which I outlined my experience-based approaches to teaching and learning support in higher education, supported by literature. This was written within the UK Professional Standard Framework.

Write to

David Jonas
Superconductivity and Magnetism Group (Room P2.20)
Department of Physics
University of Warwick
Coventry CV4 7AL
United Kingdom

E-Mail:

D dot Jonas at warwick dot ac dot uk

Telephone:

+44 (0)2476 574207

Office:

P2.20