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Abstract:

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.

Registro:

Documento: Artículo
Título:Spectroscopic response of photoinduced currents in a laser-assisted scanning tunneling microscope
Autor:Bragas, A.V.; Landi, S.M.; Coy, J.A.; Martínez, O.E.
Filiación:Departamento de Física, Universidad de Buenos Aires, Ciudad Universitaria, 1428, Buenos Aires, Argentina
Año:1997
Volumen:82
Número:9
Página de inicio:4153
Página de fin:4158
DOI: http://dx.doi.org/10.1063/1.366216
Título revista:Journal of Applied Physics
Título revista abreviado:J Appl Phys
ISSN:00218979
CODEN:JAPIA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00218979_v82_n9_p4153_Bragas

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Citas:

---------- APA ----------
Bragas, A.V., Landi, S.M., Coy, J.A. & Martínez, O.E. (1997) . Spectroscopic response of photoinduced currents in a laser-assisted scanning tunneling microscope. Journal of Applied Physics, 82(9), 4153-4158.
http://dx.doi.org/10.1063/1.366216
---------- CHICAGO ----------
Bragas, A.V., Landi, S.M., Coy, J.A., Martínez, O.E. "Spectroscopic response of photoinduced currents in a laser-assisted scanning tunneling microscope" . Journal of Applied Physics 82, no. 9 (1997) : 4153-4158.
http://dx.doi.org/10.1063/1.366216
---------- MLA ----------
Bragas, A.V., Landi, S.M., Coy, J.A., Martínez, O.E. "Spectroscopic response of photoinduced currents in a laser-assisted scanning tunneling microscope" . Journal of Applied Physics, vol. 82, no. 9, 1997, pp. 4153-4158.
http://dx.doi.org/10.1063/1.366216
---------- VANCOUVER ----------
Bragas, A.V., Landi, S.M., Coy, J.A., Martínez, O.E. Spectroscopic response of photoinduced currents in a laser-assisted scanning tunneling microscope. J Appl Phys. 1997;82(9):4153-4158.
http://dx.doi.org/10.1063/1.366216