
Experimental works on acoustic surface phonons in thin films show the existence of asymmetric cross-sections. These lineshapes are deviation from the Lorentzian shape /l/. We use previous work /2/ in order to show that the origin of those asymmetries lies on the time reversa1 properties of the system /3/.
[PHYS.HIST] Physics [physics]/Physics archives
[PHYS.HIST] Physics [physics]/Physics archives
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