Quantum materials are rapidly emerging as the basis for possible novel computation devices. However, fully understanding the interplay between magnetic and electronic excitations are preventing us from realizing their full potential. In my talk I will show how realizing the microscopic magnetic textures in quantum materials is crucial to the understanding of transport phenomena on the macro scale.
I will demonstrate this with two examples from two different types of materials. First, I will show how scanning nanoSQUID-on-tip magnetic imaging of magnetically doped topological insulators reveal the underlying fragility of the Quantum Anomalous Hall effect at elevated temperatures. Then, I will show how with a combination of transport, magnetization, and magnetic imaging of the Weyl semimetal Co3Sn2S2, we find that a hidden spin texture is responsible for the anomalous transport behavior in the material. These observations show that better understanding of the microscopic magnetism in these systems reveal new phenomena and deepen our understanding of the interplay between magnetic textures and electronic properties.
Speaker: Ella Lachman, UC Berkeley
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