Three PhD opportunities in 2D materials – closing date 6 May 2019

Project Description 1 – Nano-magnetism in atomically thin 2D quantum materials and their heterostructures

Following the discovery of graphene, a large family of layered crystals has attracted significant attention. The properties of these materials range from superconductors and metals, to semiconductors and insulators. Properties of such quantum materials in a few-atomic-layer form are strongly influenced by the quantum confinement of the electronic excitations due to the extreme crystal thinness. Surprisingly, a family of layered ferromagnetic materials exists, which preserve their ferromagnetic properties even in an atomic monolayer form. Such 2D materials will revolutionise electronics, memory devices, and will have broad applications in quantum technologies, particularly in combination with other layered semiconductors. In this PhD project you will discover novel ferromagnetic monolayer materials, work on advancing their fabrication, and will develop methods for combining such materials with other 2D monolayer crystals such as graphene and transition metal dichalcogenides (TMDs). The goal is to fabricate and explore novel types of opto-electronic devices taking advantage of very large local magnetic field generated by 2D ferromagnetic materials on the nano-scale. You will join an energetic team of 5 PhD students and 2 postdocs. You will perform advanced optics experiments in the state-of-the-art laboratories of the Sheffield group, work on novel device fabrication in the modern clean room and collaborate with leading groups around the world on 2D physics and technology.

Project Description 2 – Single photon emitters in atomically thin 2D semiconductors for quantum technology applications

Following the discovery of graphene a large family of layered crystals has attracted significant attention. Surprisingly, single photon emission from unusual defect states was found in several 2D semiconductors called transition metal dichalcogenides (TMDs). It was then shown that such defects can be prepared at will, opening a new class of materials with a potential for quantum technologies, where single photon emitters (SPEs) are at the core of communication and computing schemes. In this PhD project you will discover new types of SPEs and extend their wavelength range to telecom bands; work on advancing integration of SPE in photonic structures such as microcavities, waveguides and photonic crystals, where the single photon emission rate can be controlled. You will join an energetic team of 5 PhD students and 2 postdocs. You will perform advanced optics experiments in the state-of-the-art laboratories of the Sheffield group, work on novel device fabrication in the modern clean room and collaborate with leading groups around the world on 2D physics and technology.

Project Description 3 – Photonics with atomically-thin 2D quantum materials beyond graphene

The isolation of single-atomic layer graphene has led to a surge of interest in a large family of layered crystals with strong in-plane bonds and weak van der Waals interlayer coupling. Properties of such quantum materials in a few-atomic-layer form are strongly influenced by the quantum confinement of the electronic excitations due to the extreme crystal thinness. Heterostructures made by stacking different atomically thin 2D crystals provide a platform for creating new artificial materials with potential for discoveries and applications. In this PhD project you will work on advancing fabrication technology to explore the potential of van der Waals heterostructures in photonics. We focus on studies of the strong light-matter interaction in 2D materials embedded in microcavities, opening unprecedented possibilities to explore new physics and device applications. You will join an energetic team of 5 PhD students and 2 postdocs. You will perform advanced optics experiments in the state-of-the-art laboratories of the Sheffield group, work on novel device fabrication in the modern clean room and collaborate with leading groups around the world on 2D physics and technology.

See further details at http://ldsd.group.shef.ac.uk/research/2d-materials/

Please contact – Professor Alexander Tartakovskii – a.tartakovskii@sheffield.ac.uk

 

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