Spectroscopic response of photoinduced currents in a laser-assisted scanning tunneling microscope

Thermal expansion of the sample or tip in a laser-assisted scanning tunneling microscope (STM) junction can obstruct the study of other phenomena related with STM-light interactions, when photoinduced currents are analyzed. In this article, we show that the thermal contribution is proportional to th...

Descripción completa

Detalles Bibliográficos
Autores principales: Bragas, A.V., Landi, S.M., Coy, J.A., Martínez, O.E.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00218979_v82_n9_p4153_Bragas
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00218979_v82_n9_p4153_Bragas
record_format dspace
spelling todo:paper_00218979_v82_n9_p4153_Bragas2023-10-03T14:22:18Z Spectroscopic response of photoinduced currents in a laser-assisted scanning tunneling microscope Bragas, A.V. Landi, S.M. Coy, J.A. Martínez, O.E. Thermal expansion of the sample or tip in a laser-assisted scanning tunneling microscope (STM) junction can obstruct the study of other phenomena related with STM-light interactions, when photoinduced currents are analyzed. In this article, we show that the thermal contribution is proportional to the average tunneling current and that this can be used to distinguish it from other contributions. Simultaneous tunneling current-voltage and photoinduced current-voltage curves are recorded for highly oriented pyrolitic graphite and gold samples with a Pt tip. We have done the measurements for two different polarizations of the incident beam. We show that the I-V curves can be used to discriminate between different mechanisms that appear, producing photoinduced currents. © 1997 American Institute of Physics. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00218979_v82_n9_p4153_Bragas
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description Thermal expansion of the sample or tip in a laser-assisted scanning tunneling microscope (STM) junction can obstruct the study of other phenomena related with STM-light interactions, when photoinduced currents are analyzed. In this article, we show that the thermal contribution is proportional to the average tunneling current and that this can be used to distinguish it from other contributions. Simultaneous tunneling current-voltage and photoinduced current-voltage curves are recorded for highly oriented pyrolitic graphite and gold samples with a Pt tip. We have done the measurements for two different polarizations of the incident beam. We show that the I-V curves can be used to discriminate between different mechanisms that appear, producing photoinduced currents. © 1997 American Institute of Physics.
format JOUR
author Bragas, A.V.
Landi, S.M.
Coy, J.A.
Martínez, O.E.
spellingShingle Bragas, A.V.
Landi, S.M.
Coy, J.A.
Martínez, O.E.
Spectroscopic response of photoinduced currents in a laser-assisted scanning tunneling microscope
author_facet Bragas, A.V.
Landi, S.M.
Coy, J.A.
Martínez, O.E.
author_sort Bragas, A.V.
title Spectroscopic response of photoinduced currents in a laser-assisted scanning tunneling microscope
title_short Spectroscopic response of photoinduced currents in a laser-assisted scanning tunneling microscope
title_full Spectroscopic response of photoinduced currents in a laser-assisted scanning tunneling microscope
title_fullStr Spectroscopic response of photoinduced currents in a laser-assisted scanning tunneling microscope
title_full_unstemmed Spectroscopic response of photoinduced currents in a laser-assisted scanning tunneling microscope
title_sort spectroscopic response of photoinduced currents in a laser-assisted scanning tunneling microscope
url http://hdl.handle.net/20.500.12110/paper_00218979_v82_n9_p4153_Bragas
work_keys_str_mv AT bragasav spectroscopicresponseofphotoinducedcurrentsinalaserassistedscanningtunnelingmicroscope
AT landism spectroscopicresponseofphotoinducedcurrentsinalaserassistedscanningtunnelingmicroscope
AT coyja spectroscopicresponseofphotoinducedcurrentsinalaserassistedscanningtunnelingmicroscope
AT martinezoe spectroscopicresponseofphotoinducedcurrentsinalaserassistedscanningtunnelingmicroscope
_version_ 1807315189055356928

Ejemplares similares