In this paper we examine the existence of anharmonic localized modes using a full two-body potential to describe all interactions between particles in a zinc-blende-structure material, and we make a comparison with the results obtained with a nearest-neighbour force constant model that includes interactions up to quartic anharmonicity. We show that for amplitude up to a maximum displacement of the order of 0.25 Angstrom there are no appreciable differences between the two approaches, while for the largest amplitudes the force constant model gives unphysical results.

Intrinsic localized modes in the one-dimensional zinc-blende structure: two-body potential versus anharmonic force constant model / Franchini, Anna; Bortolani, Virginio; R. F., Wallis. - In: JOURNAL OF PHYSICS. CONDENSED MATTER. - ISSN 0953-8984. - STAMPA. - 12:(2000), pp. 5629-5637. [10.1088/0953-8984/12/26/310]

Intrinsic localized modes in the one-dimensional zinc-blende structure: two-body potential versus anharmonic force constant model

FRANCHINI, Anna;BORTOLANI, Virginio;
2000

Abstract

In this paper we examine the existence of anharmonic localized modes using a full two-body potential to describe all interactions between particles in a zinc-blende-structure material, and we make a comparison with the results obtained with a nearest-neighbour force constant model that includes interactions up to quartic anharmonicity. We show that for amplitude up to a maximum displacement of the order of 0.25 Angstrom there are no appreciable differences between the two approaches, while for the largest amplitudes the force constant model gives unphysical results.
2000
12
5629
5637
Intrinsic localized modes in the one-dimensional zinc-blende structure: two-body potential versus anharmonic force constant model / Franchini, Anna; Bortolani, Virginio; R. F., Wallis. - In: JOURNAL OF PHYSICS. CONDENSED MATTER. - ISSN 0953-8984. - STAMPA. - 12:(2000), pp. 5629-5637. [10.1088/0953-8984/12/26/310]
Franchini, Anna; Bortolani, Virginio; R. F., Wallis
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/12910
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