About me
Dr. Lindsey Lynch
I'm a trainee clinical scientist on the Scientist Training Programme in Medical Physics with the Belfast Health and Social Care Trust — a three-year programme combining clinical rotations with a master's in Clinical Science.
Before that I was a data scientist at Nexus Brands Group, where I built dashboards, pipelines, and machine learning models as part of a small global data team supporting 18 businesses.
I also did a PhD in material physics at Queen's University Belfast, imaging nanoscale heating in ferroelectric domain walls.
I'm based in Northern Ireland. You can read my CV or find me on LinkedIn.
My PhD
I spent three years at Queen's University Belfast studying ferroelectrics — crystals with a built-in electric polarisation that you can flip with a voltage, which makes them useful for things like memory chips and sensors.
Inside these crystals, the boundaries between differently-polarised regions are called domain walls. They're only a few atoms wide, but they can behave like tiny wires, carrying electrical current through an otherwise insulating crystal — and because you can write and erase them with a voltage, scientists are excited about using them as rewirable nanoscale circuits for future memory and logic devices.
My research asked: if domain walls conduct, do they generate much heat — and would that stop them working in a real device? Using a technique called scanning thermal microscopy, I directly mapped the heat given off while current flowed through walls in thin-film lithium niobate, and could see hot spots exactly where the walls cluster.
domains.exe
A little arcade game based on my research: you're a charge carrier travelling along the conducting domain walls of a ferroelectric crystal — shoot the defects, watch your heat, and reach the door before the device blows. Every level is a real material with conducting walls.
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