The features of the ground state and the phonon frequency spectrum of a finite Frenkel-Kontorova type model are investigated in presence of quartic anharmonic nearest-neighbor interactions. The different computational techniques used allow us to determine with great accuracy the critical parameter for the ground-state symmetry breaking transition, showing its dependence on the strength of the interatomic anharmonicity introduced. The phonon gap. the linearized vibrational modes and their parity are also studied in the vicinity of the transition point. (C) 2002 Elsevier Science B.V. All rights reserved.

Anharmonic effects in a finite Frenkel-Kontorova type chain / Vanossi, Andrea; Franchini, Anna; Bortolani, Virginio. - In: SURFACE SCIENCE. - ISSN 0039-6028. - STAMPA. - 502-503:(2002), pp. 437-442. [10.1016/S0039-6028(01)01990-2]

Anharmonic effects in a finite Frenkel-Kontorova type chain

VANOSSI, andrea;FRANCHINI, Anna;BORTOLANI, Virginio
2002-01-01

Abstract

The features of the ground state and the phonon frequency spectrum of a finite Frenkel-Kontorova type model are investigated in presence of quartic anharmonic nearest-neighbor interactions. The different computational techniques used allow us to determine with great accuracy the critical parameter for the ground-state symmetry breaking transition, showing its dependence on the strength of the interatomic anharmonicity introduced. The phonon gap. the linearized vibrational modes and their parity are also studied in the vicinity of the transition point. (C) 2002 Elsevier Science B.V. All rights reserved.
502-503
437
442
Anharmonic effects in a finite Frenkel-Kontorova type chain / Vanossi, Andrea; Franchini, Anna; Bortolani, Virginio. - In: SURFACE SCIENCE. - ISSN 0039-6028. - STAMPA. - 502-503:(2002), pp. 437-442. [10.1016/S0039-6028(01)01990-2]
Vanossi, Andrea; Franchini, Anna; Bortolani, Virginio
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/305851
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