Details

Autor(en) / Beteiligte

• Falcão, P R N
• Lyra, M L

Titel

Rectification of acoustic phonons in harmonic chains with nonreciprocal spring defects

Ist Teil von

• Journal of physics. Condensed matter, 2020-06, Vol.32 (24), p.245401-245401

Ort / Verlag

England: IOP Publishing

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The scattering of acoustic phonons by nonreciprocal spring defects inserted in an harmonic chain is investigated. The degree of nonreciprocity of the forces mediated by the defect springs is parameterized by a single quantity Δ that effectively takes into account the interaction of the coupled masses with hidden degrees of freedom of an underlying nonequilibrium system. We demonstrate a pronounced rectification effect with transmission having a preferential direction. Nonreciprocity also allows energy exchange between the system and the medium. Further, we show a cooperative action between defects mediated by resonant cavity modes. The influence of damping forces is also explored and shown to promote the rectification of the reflected vibrational wave component.