TY - JOUR
T1 - Efficient anharmonic phonon generation using a quasiperiodic lattice
AU - Limas, I.
AU - Naumis, G. G.
AU - Salazar, F.
AU - Wang, C.
N1 - Funding Information:
We thank J. Talamantes for letting us to use his unfolding computer program. This work has partially been supported by CONACyT-41492F, NSF-CONACyT-2003-C02-41538, DGAPA-IN108502-3 and IN110305. Numerical calculations have been performed at Bakliz of DGSCA-UNAM.
PY - 2005/3/28
Y1 - 2005/3/28
N2 - The effects of anharmonic interactions on the phonon modes in quasiperiodic systems are studied by looking at the time-evolution Fourier spectrum. The results reveal an efficient generation of high-amplitude harmonics in Fibonacci chains. We also perform an energy-level-spacing analysis of the spectrum. Anharmonic contributions do clearly manifest by changing the level clustering behavior observed in quasiperiodic chains, and contrary to the periodic case, where the distribution is insensitive to weak anharmonic interactions. This result suggests a structural instability of the self-similar vibrational spectrum in quasiperiodic systems.
AB - The effects of anharmonic interactions on the phonon modes in quasiperiodic systems are studied by looking at the time-evolution Fourier spectrum. The results reveal an efficient generation of high-amplitude harmonics in Fibonacci chains. We also perform an energy-level-spacing analysis of the spectrum. Anharmonic contributions do clearly manifest by changing the level clustering behavior observed in quasiperiodic chains, and contrary to the periodic case, where the distribution is insensitive to weak anharmonic interactions. This result suggests a structural instability of the self-similar vibrational spectrum in quasiperiodic systems.
UR - http://www.scopus.com/inward/record.url?scp=14644444137&partnerID=8YFLogxK
U2 - 10.1016/j.physleta.2005.01.054
DO - 10.1016/j.physleta.2005.01.054
M3 - Artículo
AN - SCOPUS:14644444137
SN - 0375-9601
VL - 337
SP - 141
EP - 146
JO - Physics Letters, Section A: General, Atomic and Solid State Physics
JF - Physics Letters, Section A: General, Atomic and Solid State Physics
IS - 1-2
ER -