290S/290K Quantum Materials Seminar speaker Aaron Szasz (LBL) Wednesday, May 3 at 2 pm in Physics South 402

Time/Venue Wednesday, May 3 at 2 pm in Pacific time in Physics South 402 and via Zoom:
https://berkeley.zoom.us/j/99523499113pwd=REovb3pyam03WXQwbEhrU3dqNHZvdz09
Meeting ID: 995 2349 9113 Passcode: 600704
Host Joel Moore
Title Competing magnetic and nematic phases of a highly-frustrated spin-1 triangular lattice model
Abstract I will discuss my work (2206.04087) on a highly frustrated spin-1 model on the triangular lattice, with nearest- and next-nearest-neighbor antiferromagnetic S.S interactions and nearest-neighbor (S.S)^2 interactions. Using DMRG, we find three magnetically ordered phases, namely 120∘ spiral order, stripe order, and tetrahedral order, as well as two spin nematic phases: ferroquadrupolar and antiferroquadrupolar. While our data could be consistent with a spin liquid phase between the 120∘ spiral and antiferroquadrupolar orders, the more likely scenario is a direct continuous transition between these two orders.