Evidence for the formation of metallic In after laser irradiation of InP

Autor(es):Mostrar menos -

Cabral, L. ^[1] ; Andres, J. ^[2] ; Machado, T. R. ^[3] ; Picinin, A. ^[1] ; Rino, J. P. ^[1] ; Lopez-Richard, V. ^[1] ; Longo, E. ^[3] ; Gouveia, A. F. ^[4] ; Marques, G. E. ^[1] ; da Silva, E. Z. ^[5] ; San-Miguel, M. A. ^[6]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Phys, BR-13565905 Sao Carlos, SP - Brazil

^[2] UJI, Dept Inorgan & Organ Chem, Castellon de La Plana 12071 - Spain

^[3] Univ Fed Sao Carlos, LIEC CDMF Dept Chem, BR-13565905 Sao Carlos, SP - Brazil

^[4] State Univ Piaui UESPI, Dept Chem, POB 381, BR-64002150 Teresina, PI - Brazil

^[5] Univ Estadual Campinas, Inst Phys Gleb Wataghin IFGW, BR-13083859 Campinas, SP - Brazil

^[6] State Univ Campinas UNICAMP, Inst Chem, BR-13083970 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Applied Physics; v. 126, n. 2 JUL 14 2019.
• Citações Web of Science: 0

Resumo

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 electronphonon 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. (AU)

• Processo FAPESP: 14/19142-2 - Caracterização e processamento de nanoestruturas semicondutoras e aplicações como dispositivos
• Beneficiário: Gilmar Eugenio Marques
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 16/23891-6 - Modelagem computacional da matéria condensada
• Beneficiário: Alex Antonelli
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs