TY - JOUR
T1 - Relative permittivity and Hubbard U of pentacene extracted from scanning tunneling microscopy studies of p-doped films
AU - Ha, Sieu D.
AU - Qi, Yabing
AU - Kahn, Antoine
N1 - Funding Information:
Funding from the National Science Foundation ( DMR-0705920 ) is gratefully acknowledged. We thank Professor Z.G. Soos for valuable discussions.
PY - 2010/8/10
Y1 - 2010/8/10
N2 - 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.
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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U2 - 10.1016/j.cplett.2010.06.085
DO - 10.1016/j.cplett.2010.06.085
M3 - Article
AN - SCOPUS:77955415091
VL - 495
SP - 212
EP - 217
JO - Chemical Physics Letters
JF - Chemical Physics Letters
SN - 0009-2614
IS - 4-6
ER -