Extended Data Fig. 4: BEC by rapid cooling for different geometries of the external field.
From: Bose–Einstein condensation of quasiparticles by rapid cooling
a, BLS spectrum as a function of time. The BLS signal (colour-coded, log scale) is proportional to the density of magnons. FM indicates the fundamental mode, EM – the edge mode, and 1st M – the first thickness mode. The vertical dashed lines indicate the start and the end of the pulse (τP = 150 ns, U = 0.9 V). The external field was parallel to the short axis of the strip (B||y). c, BLS spectrum as a function of time for the case when the external magnetic field is parallel to long axis of the strip (B||x), (τP = 120 ns, U = 0.9 V). b,d, Normalized magnon intensity integrated from 4.95 GHz to 8.1 GHz as a function of time for the cases in a,c. The insets show the sample and measurement geometry.
