Evidence for the formation of metallic In after laser irradiation of InP
Scholar | Other documents of the author: Cabral, Luis; Andrés, Juan; Machado, Thales Rafael; Picinin, Adalberto; Rino, José Pedro; Lopez-Richard, Victor; Longo, Elson; Gouveia, A. F.; Marques, Gilmar Eugenio; da Silva, Edison; San-Miguel, Miguel A.
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TitleEvidence for the formation of metallic In after laser irradiation of InP
Structural and electronic changes induced by laser irradiation are currently of interest owing to the possibility to tune the mechanical, optical, and transport properties of the irradiated materials. In this work, ... [+]
Structural and electronic changes induced by laser irradiation are currently of interest owing to the possibility to tune the mechanical, optical, and transport properties of the irradiated materials. In this work, we investigate the effects of laser irradiation on indium phosphide, InP, by modifying the electronic temperature, Te, of the system within the density functional theory framework and performing molecular dynamics simulations to prove that the laser irradiation also provokes a local thermalization effect. We found that the process can be described by a two-stage mechanism. First, at low Te values (0–1.0 eV), the laser energy induces electronic transitions, while the InP lattice remains undisturbed and cool. In the second stage (with Te in the range of 1.0–4.0 eV), both electron-electron scattering and electron-phonon coupling processes are triggered, increasing the energy of the lattice so as to provoke a Coulomb explosion, which changes some physical chemical properties of InP. The close agreement between the simulations helps explain the formation of metallic In as it is observed in the transmission electron microscopy images. [-]
Investigation projectCAPES (Coordenação de Aperfeiçoamento de Pessoal de Nível Superior)—finance code 1—PNPD program, CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico) (Grant No. 150949/2018-9) ; FAPESP (Fundação de Amparo à Pesquisa do Estado de São Paulo) (Grant Nos. 2014/ 19142-2, 2013/07296-2, and 2016/23891-6) ; Generalitat Valenciana (PrometeoII/2014/022, ACOMP/2015/1202) ; Ministerio de Economia y Competitividad (project CTQ2015-65207-P) ; Universitat Jaume I, Spain (Project No. UJI-B2016-25).
Bibliographic citationCABRAL, L., et al. Evidence for the formation of metallic In after laser irradiation of InP. Journal of Applied Physics, 2019, 126.2: 025902.
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