Fig. 4: Structural origin of the BP-like anomaly in strain glass.
From: Boson-peak-like anomaly caused by transverse phonon softening in strain glass
a VDOS of nanodomains, parent phase matrix as well as the entirety for a strain glass model alloy (Zr–4.5%Ni). b Phonon spectra of this strain glass alloy at 40 K. The red arrow marks the phonon softening along [001], and the red dash line denotes ωBP. c Spatial distribution of order parameter (ηi) at the (110) plane for this alloy at 40 K. Red regions correspond to martensitic nanodomains. d Spatial distribution of auto-correlation function of local atomic displacement (AFLD) at 40 K. High AFLD regions (colored red) indicate a high density of excess low-frequency phonon modes.
