Quantum Materials by Design: Exploring Topological Properties of STM-Lithographed Quantum Dots

We are looking for PhD and MSc students to join a project on Topological Properties of STM-Lithographed Quantum Dots. This project aims to investigate the emergence of correlated electron states in topological quantum dot chains fabricated with atomic precision. By leveraging Scanning Tunneling Microscope (STM) lithography, we will create highly ordered chains of quantum dots on silicon substrates through hydrogen depassivation and precise placement of phosphorus atoms. This approach enables unparalleled control over the spatial arrangement and properties of the quantum dot structures, offering a unique platform for exploring fundamental questions in quantum materials science.

The study focuses on the interplay between electron-electron interactions, quantum confinement, and topological properties in these engineered systems. Specifically, we aim to examine how these factors influence the formation of correlated states and the role of edge states in relation to the chain’s topology. Edge states, a hallmark of topological systems, are particularly intriguing as they are expected to have profound implications for the electronic and quantum behaviour of the chains.

Advanced spectroscopic techniques will be employed to probe the electronic states and energy-level structure of the quantum dot chains. These experimental insights will be complemented by theoretical modelling to provide a detailed understanding of the observed phenomena. By integrating experiment and theory, we aim to unravel the intricate interplay between correlated electron physics and topological characteristics, offering new perspectives on the design and functionality of quantum materials.

This research leverages the state-of-the-art STM lithography capabilities at the University of New South Wales (UNSW), which enable atomic-scale fabrication of quantum architectures. This precision allows us to systematically study the impact of chain length, dot spacing, and edge configurations on the electronic properties of the system. Such control is crucial for elucidating the mechanisms underlying the emergence of correlated states and for tailoring these properties for specific applications.

The outcomes of this project are expected to have broad implications for quantum information science and the development of next-generation quantum materials. By advancing our understanding of how electron correlation and topology interact in confined systems, this work could contribute to the realization of robust qubits, scalable quantum computing architectures, and materials with novel electronic and topological properties.

Criteria

Enthusiastic masters/bachelors or honours graduate with knowledge in semiconductors, quantum mechanics and condensed matter physics. Knowledge of equity and diversity principles.

How to apply 

Further information: Professor Sven Rogge ([email protected]), Dr. Alexey Lyasota ([email protected]) or Dr. Nikita Komarov ([email protected]).

Applications close: until filed.