Fig. 5: Responses of dynamic behaviors to external pressure.
From: Ultrasensitive barocaloric material for room-temperature solid-state refrigeration
a, b The dynamic structure factor, S(Q,ω), for NH4I at 300 K under external pressure of a 0.1 MPa (ambient condition) and b 300 MPa, respectively. c, d Comparison of c the S(Q,ω) sliced over Q = [1.55, 1.65] Å−1 and d phonon DOSs between the high-T phase (red) and intermediate-T phase (blue) in responses to external pressure.
