Field evaporation of semiconductors assisted by nonequilibrium phonon excitations

E. P. Silaeva, J. Houard, A. Hideur, G. Martel, and A. Vella
Phys. Rev. B 92, 195307 – Published 19 November 2015

Abstract

Laser-assisted field evaporation of materials is often interpreted as an equilibrium phenomenon that can be described in terms of a thermally assisted process due to the increase of the lattice temperature defined for equilibrium phonon distribution. Our simulations, taking into account nonequilibrium phonon distribution, produced by femtosecond laser radiation, and coupled carrier-phonon kinetics in the sample, show that the evaporation process is assisted by hot phonons. An out-of-thermal-equilibrium phenomenon on the picosecond time scale is thus demonstrated in the case of femtosecond-laser-assisted field evaporation of semiconductors. It is experimentally confirmed by atom-probe measurements using an original double-pulse correlation setup.

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  • Received 17 June 2015
  • Revised 18 September 2015

DOI:https://doi.org/10.1103/PhysRevB.92.195307

©2015 American Physical Society

Authors & Affiliations

E. P. Silaeva, J. Houard, A. Hideur, G. Martel, and A. Vella*

  • Groupe de Physique des Matériaux UMR CNRS 6634, CORIA UMR CNRS 6614, Normandie Université, Université-INSA de Rouen, Avenue de l'Université, Boîte Postale 12, 76801 Saint Etienne du Rouvray, France

  • *angela.vella@univ-rouen.fr

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Vol. 92, Iss. 19 — 15 November 2015

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