Dynamical phase transition in vibrational surface modes

Details Dynamical phase transition in vibrational surface modes Dynamical phase transition in vibrational surface modes

2006-04-03

arxiv.org/abs/cond-mat/0604059v3

Braz. J. Phys. 36, 963 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures. To appear in Braz. J. Phys

Scientific paper

We consider the dynamical properties of a simple model of vibrational surface modes. We obtain the exact spectrum of surface excitations and discuss their dynamical features. In addition to the usually discussed localized and oscillatory regimes we also find a second phase transition where surface mode frequency becomes purely imaginary and describes an overdamped regime. Noticeably, this transition has an exact correspondence to the oscillatory - overdamped transition of the standard oscillator with a frictional force proportional to velocity.

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