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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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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]
Total Authors: 11
[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
Total Affiliations: 6
Document type: Journal article
Source: Journal of Applied Physics; v. 126, n. 2 JUL 14 2019.
Web of Science Citations: 0

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)

FAPESP's process: 14/19142-2 - Characterization and processing of semiconductor nanostructures and application as devices
Grantee:Gilmar Eugenio Marques
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 16/23891-6 - Computer modeling of condensed matter
Grantee:Alex Antonelli
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC