Beamline for nano-ARPES

A new beamline for nanoscale spatially resolved angle resolved photoelectron spectroscopy (Nano-ARPES) is proposed as part of the Diamond-II project. ARPES is a powerful and direct probe of the band structure in solid state materials, providing unparalleled information on the important electronic states that govern characteristics including superconductivity and novel states of matter (e.g. Topological Insulators, Weyl Semimetals) amongst many others. Beamline I05 currently provides world leading capability for ARPES experiments and consists of a high resolution (HR) branch and a Nano-ARPES branch. The design of the current Nano-ARPES branch is constrained in a number of ways; the smallest size is limited by imaging the photon source on the exit slits, the optimal energy range is different to that on the HR branch, the coherence of the beam is compromised and space constraints limit the associated infrastructure such as glove boxes around the equipment. In addition, beamline I05 is one of the most highly oversubscribed beamlines at Diamond (typically >4x). This proposal is to build a fully optimised beamline for spatially resolved ARPES at Diamond II that would provide beam sizes of <100nm to enable measurements on, for example, artificially nano-engineered structures or devices under biasing conditions. This proposal forms the first phase of expanding the synchrotron based ARPES capabilities at Diamond-II, with the long term aim of adding spin-resolved ARPES onto the current I05 branchline and implementing lasers for pump-probe experiments. This will be outlined within the context of a strategic development of ARPES in the UK.

This proposal is currently on hold.

For more information on this proposed new beamline, click the button below to download the Full Science Case:

Download Science Case

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