Job Opportunities in Quantum Science and Technology

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The Institute for Topological Insulators at the University of Würzburg seeks excellent candidates for PhD positions in the field of experimental condensed matter physics.

Our research projects involve low-temperature physics using dilution refrigerators, nanofabrication, DC electrical transport measurements, data analysis, and device simulation techniques. Advanced experimental techniques include microwave spectroscopy of Andreev states and qubits, and detection of topological states in heat transport and noise measurements. Our team has collaborations with theory and experimental groups worldwide. Strong communication skills and proficiency in scientific English are required.

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This project aims to explore superconducting and magnetic proximity effects on the topological surface state in epitaxial heterostructures of the intrinsic magnetic topological insulator MnBi₂Te₄.

Your task is to improve the molecular beam epitaxial growth of high-quality MnBi₂Te₄ films down to a single septuple-layer (SL) on a wide range of van der Waals substrates. These layers will be investigated in-situ by ARPES and other surface sensitive techniques.

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ransition metal oxides are well known for their emergent phases and novel electronic properties evolving from the various competing many‐body interactions through spontaneous symmetry‐breaking. Additionally, the topological nature of band structures, often induced by strong spin‐orbit
coupling, can give rise to new states of matter.

In one project, you will use the possibilities of heterointerfacing to create and tune composite oxide materials with topological electronic states, typically in the presence of or assisted by electron correlations. Realization thereof are predicted to be found in the rich phase diagram of 5d iridates that encompasses spin‐orbit driven Mott insulators, topological superconductivity as well as Weyl and Dirac semimetals.

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or send an email to sing@physik.uni-wuerzburg.de

The development of a solid-state system for quantum technologies and sensing applications is a very vibrant research area. An essential part of it, the spin degree of freedom, is an invaluable source of information as it provides an interface to the environment it is surrounded by. However, most of the material systems hosting spin centers are 3D and it is challenging to position them close to the sample surface. In 2020, our group experimentally identified the first intrinsic spin center in the 2D van der Waals material hexagonal boron nitride (hBN), in which coherent manipulation of spins was possible.

Our research goal is to realize vdW heterostructures by stacking multilayer 2D materials to study ordered systems incorporating hBN layers with spin defects written into it. The spin-sensitive method of choice is cw and pulsed optically detected magnetic resonance (ODMR) at different temperatures and magnetic fields.

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