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New Students Joining in 2024

We are pleased to welcome all undergraduates joining us this autumn.

Please visit our information page for further information.

Thu 15 Aug 2024, 07:25 | Tags: Undergraduates, Staff and Department

Real-space renormalisation approach to the Chalker-Coddington model revisited: improved statistics

PhD student Syl Shaw and supervisor Rudo Roemer apply the real-space renormalisation group method to the Chalker–Coddington model of the quantum Hall transition. This approach provides a convenient numerical estimation of the localisation critical exponent, ν. Previous such studies found ν=2.39 which falls considerably short of the current best estimates by transfer matrix (2.593) and exact-diagonalisation studies (2.58). By increasing the amount of data 500 fold they can now measure closer to the critical point and find an improved estimate 2.51. This deviates only 3% from the previous two values and is already better than the 7% accuracy of the classical small-cell renormalisation approach from which their method is adapted.

Sat 14 Sep 2024, 00:00 | Tags: Postgraduates, Research

Quantum engineering for compactly localized states in disordered Lieb lattices

Blending ordering within an uncorrelated disorder potential in families of 3D Lieb lattices preserves the macroscopic degeneracy of compact localized states and yields unconventional combinations of localized and delocalized phases—as shown in Liu et al. (Phys Rev B 106:214204, 2022). Danieli, Liu and Roemer proceed to reintroduce translation invariance in the system by further ordering the disorder, and discuss the spectral structure and eigenstates features of the resulting perturbed lattices. This strategy, herewith implemented in the 3D Lieb lattice, highlights order restoration as experimental pathway to engineer spectral and states features in disordered lattice structures in the pursuit of quantum storage and memory applications.

Sat 07 Sep 2024, 00:00 | Tags: Research

PhD student announced second place at UK Semiconductors Conference

Areej Aljaghwani, a 2nd year PhD student from Maksym Myronov’s Semiconductors Research Group was awarded second place in the Phil Buckle Research Communication Competition held during the UK Semiconductors Conference in July 2024.

Fri 30 Aug 2024, 12:14 | Tags: Feature News, Postgraduates

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