Acoustic lattice instabilities at the magneto-structural transition in Fe${}_{1.057(7)}$Te

K. Guratinder, E. Chan, E. E. Rodriguez +7

Fe${}_{1.057(7)}$Te undergoes a first-order tetragonal to monoclinc structural transition at T${}_S\sim 70$ K, breaking the C${}_4$ lattice symmetry and simultaneously breaking time…