Relative permittivity and Hubbard U of pentacene extracted from scanning tunneling microscopy studies of p-doped films

Sieu D. Ha; Yabing Qi; Antoine Kahn

doi:10.1016/j.cplett.2010.06.085

Relative permittivity and Hubbard U of pentacene extracted from scanning tunneling microscopy studies of p-doped films

Sieu D. Ha, Yabing Qi, Antoine Kahn

Research output: Contribution to journal › Article

7 Scopus citations

Abstract

Temperature-dependent I-V measurements determine that pentacene is effectively p-doped by tetrafluoro-tetracyanoquinodimethane (F ₄-TCNQ). It has been shown by scanning tunneling microscopy (STM) that the donated hole is localized by the ionized dopant counter potential, and that the hole can be visualized [4]. Here, it is argued that the effect of the localized hole on STM images should depend on distance as 1/r, as per the Coulomb potential. By fitting line profiles of localized hole features to the Coulomb potential, it is shown that approximate values for the relative permittivity and Hubbard U of pentacene can be extracted.

Original language	English (US)
Pages (from-to)	212-217
Number of pages	6
Journal	Chemical Physics Letters
Volume	495
Issue number	4-6
DOIs	https://doi.org/10.1016/j.cplett.2010.06.085
State	Published - Aug 10 2010

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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Ha, S. D., Qi, Y., & Kahn, A. (2010). Relative permittivity and Hubbard U of pentacene extracted from scanning tunneling microscopy studies of p-doped films. Chemical Physics Letters, 495(4-6), 212-217. https://doi.org/10.1016/j.cplett.2010.06.085

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abstract = "Temperature-dependent I-V measurements determine that pentacene is effectively p-doped by tetrafluoro-tetracyanoquinodimethane (F 4-TCNQ). It has been shown by scanning tunneling microscopy (STM) that the donated hole is localized by the ionized dopant counter potential, and that the hole can be visualized [4]. Here, it is argued that the effect of the localized hole on STM images should depend on distance as 1/r, as per the Coulomb potential. By fitting line profiles of localized hole features to the Coulomb potential, it is shown that approximate values for the relative permittivity and Hubbard U of pentacene can be extracted.",

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AB - Temperature-dependent I-V measurements determine that pentacene is effectively p-doped by tetrafluoro-tetracyanoquinodimethane (F 4-TCNQ). It has been shown by scanning tunneling microscopy (STM) that the donated hole is localized by the ionized dopant counter potential, and that the hole can be visualized [4]. Here, it is argued that the effect of the localized hole on STM images should depend on distance as 1/r, as per the Coulomb potential. By fitting line profiles of localized hole features to the Coulomb potential, it is shown that approximate values for the relative permittivity and Hubbard U of pentacene can be extracted.

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