Schematic of the triangular vanadium net (purple balls) with magnetic moments (turqouise arrows) and the anomalous hall effect (red balls are electrons and blue are holes) from the Dirac quasiparticles (Dirac diabolo shown left). Credit: MPI of Microstruc
Colloquia

Physics Colloquium with Zhu-Xi Luo on Constructive Approaches to Frustrated Magnetism

Zhu-Xi Luo (Hosted by Henriksen) from Harvard University will be presenting the colloquium "Constructive Approaches to Frustrated Magnetism: Moiré and Measurements"

Frustrated magnetism arises when spins interact through competing exchange interactions which cannot be simultaneously satisfied. When the frustrations are strong enough, exotic states can emerge such as long-range entangled spin liquids. Unfortunately, solid state materials are complicated and frustrations are hard to control: To this date, quantum spin liquids are still challenging to be realized in experiments. Naturally, researchers turn to more manageable experimental systems, in the hope of engineering frustrated magnetism constructively. I will discuss my recent works in two types of such manageable systems: moire heterostructures in van der Waals materials where many tuning knobs are available; and monitored quantum circuits where designer gates and measurements are exploited as new sources of frustrations.